Hi, Peter, In the desktop heap table you provided in last bug report interaction, it seems your desktop heap memory is enough indeed while this error happening. Now, I guess maybe there are GDI object leaks after using Eiffel Studio for a long time. Next time, if this bug happens, could you have a look at the Eiffel Studio GDI objects number? (In Windows task manager-> process tab-> view menu-> choose column->select “GDI Objects”. Then there is a column named “GDI Objects” in process tab’s table) Thanks in advance. Your help is appreciated. Have you meet this problem again in recent versions of Eiffel Studio? For me, I never meet this problem in all release of Eiffel Studio 6.1 and 6.2…