The application reside on the network drive. And in no other part of the application this error occurs. So I can't see that the AV would cause this problem just in this specific point. And not always but quite often.
Thank you.

>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