Is this on a local drive, or is this off a network share?
Is there a possibility of an antivirus/antimalware interfering?

I'd seen situations where some operations (like PACK) that may implicitly involve closing a file and immediately re-opening it would be interfered by an antivirus (e.g. the moment the file is closed, the antivirus opens it scan it -- the re-open operation ends up failing because the antivirus has the file opened exclusively).

>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