I am using STS2.5.5 with jdk 1.6 in my system with 32 BIT winx Xp it was working fine for few HRs when i installed it for the first time, after that when i restart STS it started showing exception Failed Initialize when i start the TC it throws hte exception error occurred during initialization of vm could not reserve enough space for object heap eclipse It is working fine in another system with same config, to resolve this if i delete STS and reinstall STS it works fine but again throws same error if i close STS and open it can anybody help me, i am also not able to change the size in my sts.ini if i increase memory and start STS then it will not start.