Nancy,
I tried, but guess what: I failed.
I can reproduce it in my project, but the project is just too big to strip down.
And guess what again: if I throw all tms-grids on a form, there is no problem...
However, if I change code in my project and rebuild, all memory addresses change (as expected, of course) and the newly produced AV popup (the one that asks to inform Microsoft) points to a new error address (as expected) and this address points to exactly the same line. I even split up this composed AND function into three different lines, rebuild and again it points to the first line: if assigned(FSyncGrid)....
I'll come back if I can reproduce in a sample.
John