Category Archives: development

How to solve error rake aborted! Unknown database ‘mysite_development’

In the beginning of my Ruby On Rails project I tried to run migration command

and got the error bellow:


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How to solve – Can’t connect to MySQL server on ‘localhost

Yesterday I started developing a site using Ruby On Rails with MySQL database. When I tried to connect to MySQL I got error message


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How to solve error A call to PInvoke function MyMethod has unbalanced the stack.

Today I upgraded a C# program from .NET 2.0 to .NET 4.0 and started debugging it. I got the error message when pInvoke called a C++ function in one of my DLLs:


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How to solve the error Debug Certificate expired

Today when I started the emulator I got the error message:


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How to develop games for iPhone without a Mac

Hi. Many people would like to develop for iPhone, iPad and Mac but don’t have enough money to buy a Mac (me included). Tweet

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How to install and configure NME on MS Windows

My intention here is to help you install and configure HaxeNME for Windows. First of all, go here and download and install FlashDevelop. You may not have the intention to release Flash games but you will need it for debugging. … Continue reading

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Hey, I found out a nice project: Haxe NME

On March 17 read a very interesting post titled The mobile cross-platform developmentĀ headache. Tweet

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How to solve – Blackberry Playbook simulator hangs on start up

Among many platforms, cocos2d-x let us develop for Blackberry Playbook. Blackberry offers a simulator to ease development. Unfortunately my video card is rather old and my VM stops loading at the point shown in picture 1. Picture 1 – Playbook … Continue reading

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100 cocos2d recipes to ease your life

Today I bought an amazing book about cocos2d. Amazing? Yes. You may be wondering why. Let me tell the reason: it has 100 recipes ready for use. There is no need to reinvent the wheel in order to solve day-to-day … Continue reading

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How to solve keytool error unknown format type at

Today I was trying to get the MD5 fingerprint of my signing certificate (the one I use to sign my Android programs). The command is pretty straight


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