need help trouble shooting

[Tricia PORTER]

rbase 6.5++ windows (on a network)   I'm still trying to trouble shoot my database problems and I noticed when one of my procedures gets to the command line "rename table tblname to tablename2" I get the following error:   "RBG65.exe has generated errors and will be closed by windows.  you will need to restart the program.  An error log is being created."   I went to my tables and tried to rename a "test" table that I created and I got the error again, so for some reason I can not rename any of my tables.   This may be an unrelated problem, but when I gateway data into my tables I get the following message:   "There is insufficient disk space on either the target drive or the temporary file drive.  The operation may fail.  Do you wish to continue?   I do continue, and my data seems to gateway fine.   Can anyone offer some direction on where to start trouble shooting for this problem?  My two main problems are, I keep getting the above error message when I run certain procedures, and my database is running very slow.  Even when I move the scroll bar in a table it moves very slowly.  I did clear all of my variables and that did not seem to make a difference.  Another suggestion I got was to check my indexes and I'm going to work on that now.   All help is very much appreciated.  Tricia