Started to experience a strange problem with the code below

WITH aforms[Icurform].pageframe1.page1.hitlist
IF .LISTINDEX = 0
.LISTINDEX = 1 && line causing this error
ENDIF
ENDWITH

Problem seems to be intermittent and the same code works in most cases.
Commenting this fragment results in the same error for

THISFORM.pageframe1.page1.hitlist.ROWSOURCE="thisform.first_lines"

in Show method.

To be exact before refreshing hitlist PHD search is run and funnily enough the problem manifests itself only for some keywords in certain free table. PHD search itself creates a cursor correctly for this word.

Any hints are greatly appreciated.

Thank you.
Michael