Thank you, Bruno. I will try this too.

>I would try to delay the single statements like that:
> INDEX ON FIELD1 TAG FIELD1
>Wait window "Indexing..." Timeout 3
> INDEX ON FIELD2 TAG FIELD2
>Wait window "Indexing..." Timeout 3
> INDEX ON FIELD3 TAG FIELD3
>Wait window "Indexing..." Timeout 3
> INDEX ON FIELD4 TAG FIELD4
>Wait window "Indexing..." Timeout 3
> INDEX ON FIELD5 TAG FIELD5
>Wait window "Indexing..." Timeout 3
> INDEX ON FIELD6 TAG FIELD6
>Wait window "Indexing..." Timeout 3
>
>and see if it happens again.
>
>HTH
>
>Bruno
>
>
>>>Hi,
>>>
>>>I have trapped (using Try / Catch) an error "File is not open" in the following section of the code:
>>>
>>>

>>>IF SELECT("V_WO_NUM") > 0 
>>>	SELECT V_WO_NUM
>>>	INDEX ON FIELD1 TAG FIELD1
>>>	INDEX ON FIELD2 TAG FIELD2
>>>	INDEX ON FIELD3 TAG FIELD3
>>>	INDEX ON FIELD4 TAG FIELD4
>>>	INDEX ON FIELD5 TAG FIELD5
>>>	INDEX ON FIELD6 TAG FIELD6
>>>	SET ORDER TO TAG FIELD3
>>>ENDIF 
>>>

>>>
>>>Before the above code the cursor V_WO_NUM is created by SQL SELECT (getting data from a VFP table).
>>>
>>>What could possible be wrong with the above (not one time but almost every other day) that it causes the problem? And I could never duplicate this error on my PC.
>>>
>>>TIA
>>
>>Adding NOFILTER to the SQL Select did not resolve the problem. The customer still gets the error. I will set the TRY CATCH between each line of code above to see if I can "catch" more specifically the offending line.