>>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
>
>AFAIK you can not add more than 1 index if the cursor is not created with readwrite clause. And if it is, then NOFILTER is redundant.

In VFP9 SP2 that is not correct:

CREATE CURSOR Source ;
	( cStr C( 1 ) ;
	, iInt I )

INSERT INTO Source ( cStr, iInt ) VALUES ( "A", 1 )
INSERT INTO Source ( cStr, iInt ) VALUES ( "B", 2 )

SELECT * FROM Source INTO CURSOR Test NOFILTER

SELECT Test
INDEX ON cStr TAG cStr
INDEX ON iInt TAG iInt

DISPLAY STATUS && 2 tags present on cursor Test