Bug? Black window on b4j startup

[rnlev]

Hello.
I'm trying to start B4J for the first time to test it and maybe complement my development tool set with it but I only get a black window.
After 1 hour, the memory usage of b4j.exe stopped raising at almost 2G but still no IDE.
My system is old (Windows 7 x64, Core 2 duo, 4GB ram, HDD 160 GB) but still it can run (more like crawl XD) most coding tools.
I also tried B4A with the same results.
Any thoughts?
Thanks.

 

[Chris2]

Maybe you need a later version of .Net?

B4J opens with black screen. Minimum installation requirements may be wrong.

I managed to reproduce the problem on a virtual machine. After installing B4J Version 8.90 on a new installation of Windows 7 32 bit, B4J did not open and a message appeared saying that it needs Dot Net Framework version 4.0.30319 After installing the requested version of Dot Net V4.0.30319...

www.b4x.com

 

[Chris2]

I should have said first, welcome to B4X!
Once you get it running, I'm sure you'll find it to be a great product and these forums very helpful.

 

[rnlev]

It was my bad. I searched on the forums for "Black window startup error" and I didn't find the thread with the answer. But once I installed .Net 4.5 the IDEs started properly.
Thanks for everything.