Hi Cindy,

Problem solved. In my search form combobox valid event code I had
SET FILTER TO mytable.myfield = ALLT(THISFORM.cboCompany.DisplayValue)

When I exited the search form and went to the main form it seems that the FILTER condition got lost or something. The Prev and Next nav buttons SKIP and SKIP -1 in the main form took the cboCompany value and caused an error.

To fix the problem I changed my search form combobox valid code to
PUBLIC save_company
save_company=ALLT(THISFORM.cboCompany.DisplayValue)
SET FILTER TO mytable.myfield = save_company

I am not really sure I understand the problem, but I fixed it. Thanks again.