Category Archives: Uncategorized

Aspen – failed to authenticate current system user

Found myself into a problem today trying to get to work Aspen Process Explorer 6.1 on Windows 7. The error we received was

Security Authentication Error: Info: Failed to authenticate current system user: username with the domain domainname

Aspen process explorer authentication error

If you looked at the logs of the AFW Security Manager you would see that in some cases it worked if you typed the credentials instead of leting Windows 7 pass the security to the application.

In our case we were working on a windows 7 deployment on all of our desktops and most of those desktops had Aspen Process Explorer installed, so it was crucial for us to get the Aspen process explorer authentication error fixed

We solved this by changing the compatibility level of the application to Windows XP. It actually didn’t need to be run as administrator, changing the compatibility level was enough.

Hope it helps solving your Aspen process explorer authentication error.


10 things you should know before buying vmware workstation

Managed to take the time to prepare a list of things that you need to know before buying vmware workstation which I consider your first step into virtualization. Hope you find it useful. 
Buy vmware workstation

1 – Multiple os instances on the same 

The first point I want to make here is that you can run multiple instances of an operative system on the same computer, that means that you are not running a sort of emulation on vmware workstation, you are actually running separate instances that are completely independent from each other.

This is an advantage over other other virtualization solutions for the end user that emulates the operative system running on the virtual machine and, in some cases, if one of the emulations fails the others also get affected.

2 – Specific Hardware

Unlike other vmware products that may require a specific hardware to install on or to run on, Vmware workstation doesn’t have an specific requirement other than enough hardware to run the base operative system and the virtual machines that will be hosting.

For example, in Oder to install ESXi and have proper support from vmware you are required to use hardware that is included on vmware’s compatibility guide. Workstation doesn’t have such need.

3 – You still need a base OS

Vmware workstation runs on top of an operative system like windows or Linux just like any other application.

So, for you to be able to run workstation you still need to have a base operative system unlike ESXi that is an operative system by itself.

4 – Limited resources

You have limited hardware resources in order to run your workstation’s virtual machines. That limit is set by the amount of free resources (memory, CPU and disk) that you have available on your desktop or laptop.

You also need to remind that hardware resources are also shared with the base operative system and with any other application that runs on top of it so take a closer look on your available hardware.

5 – Long list of supported Operative systems

Unlike other virtualization software for the end user vmware workstation supports a huge list of operative systems.

The las test version of Vmware workstation supports the following operative systems can be found at the vmware compatibility guide

6 – Compatibility with other vmware products
One of the things that I like the most of vmware products is the compatibility between each other and workstation is not the exemption.

During virtual machine creation you can set the compatibility level of the vm so if you need to move it in the future to another vmware product you can do it without problems.

In some cases you can also change the compatibility level of the virtual machine after it has been created but certain limitations exists because depending on the change that you need to make you will also need to change some configurations inside the guest OS.

7 – Licenses requirements
On thing that anyone need to know before buying vmware workstation is that an operative system license is required for each and every powered on virtual machine.

That means that if you have 3 powered on Windows 2008 vms you will need 3 Windows 2008 licenses. There are some options that you can use like buying one specific licenses of Windows 2008 and it will allow you to run as many vms that your hardware can with the operative system.

Those licenses are not available on every country so please contact your Microsoft partner  or reseller in order to get the proper license agreement your your lab.

8 – Hardware Maximums

vmware has improved workstation’s hardware limits. The latest version maximums are:

Support for 16 vCPUs
8TB SATA disks
64GB of RAM
20 virtual networks
SSD Passthrough
USB3 streaming

9 –  Snapshots and clones

One of the best features of vmware workstation for a home lab are snapshots. With snapshots you can set a point of time for your vm before starting to make changes.

If anything goes wrong you can always go back to that snapshot and, basically, go back in time which is something good in a lab or test environment.

The other excellent feature are clones which allows you to create a virtual machine install al the software you need and then clone it any time you need. Cloning a vm with all the software required installed only takes a few minutes depending on your disks speed.

10 – virtual networks

vmware allows you to create different kind of networks depending on your special needs. this is extremely important if you are working with multi -tiered applications where a front end and a back end is needed. The most common types of virtual networks that are in use today are internal and externals.
Internal networks allows virtual machines to communicate with each other but not with the outside network. If you need the vms to communicate with the external world the vms will have to use an external network.

This article was also published on under the title 10 cosas que deberías saber antes de comprar vmware workstation.

Cloud computing impact on open source software adoption

Not long ago companies were reluctant to the idea of implementing open source software on their data centres unless there were a financial crisis that limited the budget available for software acquisition or that a hacker employee were able to deploy the software using his/her knowledge.

On this particular case, when speaking about open source software, I’m referring to infrastructure software that runs on servers and provides services to a group of users on the network.

Lots of open source project with great products/solutions were backed by a confident and loyal community of users that believed on what they were developing. On the other hand we also had a lots of good open source projects with confident communities that developed great products/solutions but had a financial support from one or more companies. Companies that invested on an idea.

without caring about the source of the project, whether financed by a company or not, when a new investor came into play they found the same questions over and over. Is there a market whiling to deploy enterprise open source solutions? do they have the internal knowledge to support this kind of technologies?.

The investors finally found the answer to this questions a few years ago with the maturity of cloud computing solutions and cloud computing providers. The idea is not new, SaaS. Software as a Service were around for long time but the technology just didn’t fit the requirements.

As long as the companies adopted cloud computing for their services it was easy to open source projects to stay away of the idea of "open source" and moving to the cloud computing field. 

Players like Amazon or Rackspace are simplifying the adoption of this technologies, why?. Because it’s easier to the company behind the project to deploy their solutions on the cloud and provide their product or service for a monthly fee. With that, it made sense to everyone.

Now companies doesn’t have to run software (open source or propietary) on their premises. Just a monthly fee paid by credit card is enough. Their problems shifted from maintaing a smooth infrastructure and competent staff to control Service Level Agreements, analyse security policies and backup and recovery strategies in place from the vendor. 

The impact of the cloud computing on open source software adoption is huge because now the customers just don’t care if the software is open source or not, they just care that it works, that it’s safe and that will be available when the users need to use it. Open source projects now have the option of take their solutions to the cloud and offer those to the customers for a fair price.

Instead of what used to happen 5 years ago, the companies that financed an open source project now have a way to market their products that were not available before. With the right communication and marketing strategy they have now a broader and more global market on their hands.

We are in a time of changes when we talk about technology. Software and hardware companies should be paying attention to this changes.

Nicolás Solop  


vmware vexpert 2010-11-12-13

Named vmware vexpert 2013 – some thoughts about the efforts for next year

Last night received the notice that I was named vmware vexpert 2013. As in previous years where the vexpert committee elected me as vexpert had the same impact on me and the same idea run into my had… what are you going to do more, or different, this year in order to be named vexpert the next one?.

Users need information, help and knowledge that we have in order to solve their problems, to define an architecture for their systems or simply a friendly line of text from an expert that helps them move ahead without doubt. They need our experience to be used as a tool that helps them to move forward and that’s what we, as vexperts, must be willing to share.

Last year didn’t have the chance to participate the way I wanted on the community forum but did a lot of lecturing, recording podcasts and videos. Next year needs to be different the way things are changing. I think that taking part of the online community forum is a great way to help and find your way in the arena but I also think that for some people is more useful to watch a recorded video or taking an online presentation. That’s the way next year is going to be in my case, participating more on multimedia content like podcasting on blogging, recording videos and podcasts and trying to regain lost terrain on the forums.

The program is growing fast and the results are clearly visible with the amount of new vexperts that were named this year. Makes me happy to see that a lot of spanish people finally received their price for the hard work they do. Seems to me that vmware finally started to recognize the hard work of non-english speakers from emerging markets which I think is something great.

For those who are not familiar, the vexpert program recognizes the effort that some people make beyond the scope of the work they do taking the message of virtualization and cloud computing to the next level whether is doing presentations, podcasting, running a user group or participating on the vast user community/forums online.

As happened before, right now I can only enjoy the news and thank John Troyer and the team he runs from vmware’s evangelist group as a community manager for the excellent work they do during the year in order to get things settled for us.

Will write about this in a year, let’s see how the months ahead are for us.



vmware vexpert 2010-2011-2012-2013

Como llegamos a la volatilidad del mercado de TI de Argentina que tenemos hoy

Los diferentes rubros de tecnologia relacionados a tecnologías de la información fueron, sin temor a equivocarme, los que más crecieron en diversidad y cantidad de personal empleados durante la última década.

En el caso particular de Argentina luego de la crisis económica y social de 2001 muchos jóvenes se volcaron hacia el mundo de los sistemas para cubrir la creciente demanda de personal para cubrir los puestos de trabajo que iban abriendo las grandes multinacionales en el país debido a la competitividad del valor del dólar y la calidad de los profesionales con los que el país contaba.

¿De donde salían estos profesionales? Eran los mismos que tenían años de experiencia y títulos universitarios pero estaban desempleados debido a las grandes reducciones de personal.

Con el correr de los años, y viendo los resultados iniciales que obtenían, las primeras de estas multinacionales que se instalaban en el país al emplear a los profesionales desocupados cada vez mas empresas del exterior abrían oficinas junto a las empresas nacionales que se iban formando por aquellos años.

¿Qué pasó luego? Una vez agotada la oferta de profesionales calificados y con años de experiencia en el mercado estas empresas no tuvieron otra alternativa que comenzar a ofrecer cada vez mejores salarios para atraer profesionales lo que para el año 2005 generaba que grupos completos de trabajo migraran de una empresa a otra cada 6 meses y con la mejor de las suertes cada 1 año.

Mientras esto ocurría y para evitar esta volatilidad las empresas comenzaron con planes de capacitación internas conn el objetivo de incorporar jóvenes en los primeros años de la universidad o recién salidos del colegio secundario quienes atraídos por la promesa de ser Bill Gates en 1 año saltaron al mundo de la tecnología cual lemmings al vacío. Estos chicos que comenzaban a trabajar en tecnologia no lo hacían por su amor a la misma y mucho menos por pasión… Lo hacían por dinero.

El problema de hacer algo únicamente por el placer de hacer dinero es justamente ese, una vez que el dinero se acaba o no es suficiente comienzan a saltar de un empleo a otro como mercenarios en busca del ejercito que mejor les pague dejando de lado cualquier oportunidad de aprender, desarrollarse y mucho menos de crecer dentro de una organización.

Esto genera un deadlock. Por un lado las grandes empresas de tecnología internacionales, responsables de este paraíso ficticio llamado mercado tecnológico, tienen que estar haciendo malabarismos para crear planes a largo plazo con empleados cada vez menos dispuestos a quedarse más de 2 años en el mismo puesto de trabajo y por el otro tenemos gente trabajando en algo que no es lo que los apasiona, no están dispuestos a aprender nuevas tecnologías simplemente porque no les interesa porque no los mueve internamente.

Pero no contentos con todo esto y para seguir mostrando capacidad de absorber proyectos de diferentes geográfias las multinacionales dibujaban los números de la cantidad de personal especializado que tenían disponibles para los mismos cuando en realidad salían a buscarlos bajo demanda cuando los proyectos les eran asignados. Buscaban personal en un mercado ya saturado y volvían a buscar jóvenes sin experiencia con la promesa eterna de capacitación, formación, plan de carrera y una posición de Team Leader que en realidad eran tareas de coordinación de grandes grupos de gente por el mismo sueldo a fin de mes. Era esto o seguir aumentando los salarios para atraer personal de la competencia bajando la rentabilidad. Todo esto se hacía tan rápido que no tenían planeado un esquema de reestructuración salarial interna por lo que en muchos casos la gente que ingresaba a las empresas terminaban ganando, en algunos, casos el doble de lo que ganaba alguien en la misma posición que venía trabajando en la empresa desde hacía varios años.

Por todo esto cuando alguien le preguntaba a otra persona que conocía y estaba trabajando en la empresa a la que se estaba postulando sobre las condiciones laborales la única respuesta que obtenían era "Negocia bien el sueldo de entrada porque después no te aumentan nunca más".

No nos engañemos esto es así desde que comenzó el trueque históricamente. Es la ley de oferta y demanda por la que se rige el mercado y no por pasiones. Hubiese sido mejor un crecimiento más lento? No lo creo. Una vez que se toca el fondo como tocó Argentina la única opción real es ir hacia arriba a la velocidad que dictan el mercado interno y externo.

En mi opinión esto es lo que genera la volatilidad que existe en el mercado de TI y la cantidad de personas trabajando en algo que realmente no los motiva y es solo una cuestión monetaria.