Nadya,

>BTW, may these lines cause troubles?
>

>IF pemstatus(thisform,'hasnavstand',5) and thisform.hasnavstand
>	thisform.navstand.navupdate()
>ENDIF

The problem happens if you make two or more calls to pemstatus() within the same line of code. It doesn't have to be inside an if:

if ( pemstatus() or pemstatus() )

llOk = pemstatus() and pemstatus()

both of those lines can sometimes cause internal object references that can't be cleared up with VFP code.

The above lines need to be recoded to separate statements:

llX = pemstatus()
llY = pemstatus()
if ( llX or llY )

llOk = pemstatus()
llOk = llOk and pemstatus()