Hi Chaps

In the code below, verified by Debug,

This.Parent.lstSubJobs.ListIndex = say, 5

but

m.lnSubsListIndex = 0

So I get an array subscript error in the following lines.

It doesn't always happen and it's driving me mad.
I've tried just putting This.Parent.lstSubJobs.ListIndex as the array subscript but get the same error.

I've verified that .aSubJobsList is fully populated, esp. elements (in the above case) 5
Both the listbox and the formset's array have the same no. of elements, in the same order. The listbox (and others on other pages/forms within the formset) are fed from this central array.

Please no lectures about using formsets - I'm running with what already exists here.

Any ideas what could be amiss?

'ppreciate it

Terry

LOCAL	lnSubsListIndex

m.lnSubsListIndex	= This.Parent.lstSubJobs.ListIndex
With ThisFormSet
  If .aSubJobsList[ m.lnSubsListIndex, 3] = 0	
  	  this.ReadOnly	= .T.
  Else
  	  this.ReadOnly	= .F.  
  EndIf 
EndWith