Steve-
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>I have a "Reports" menu item containg about 30 reports. When I run any one of the bottom 4 reports, the report runs OK, but afterward, when I go back to the "Reports" menu, several of the reports (the last 4) are missing from the bottom of the menu. I have to exit the application and come back in for the reports to reappear.

This is a SWAG, but you might try PUSH MENU _MSYSMENU before running the report and then POP MENU _MSYSMENU after.