>>>Hi,
>>>
>>>Could someone suggest why I am having a problem (actually not me but the customer) in the following segment of code:
>>>
>>>The container with the text box has a property control_source. This property has a value V_WORK.EMPLOYEE
>>>
>>>The code then checks is the value of the field EMPLOYEE in the cursor V_WORK has been change. Here is the code:
>>>
>>>
>>> cControlSource = ALLTRIM( this.control_source )
>>> IF EVALUATE( cControlSource ) == OLDVAL( cControlSource )
>>> RETURN .T.
>>> ENDIF
>>>
>>>
>>>The problem occurs on the line above, EVALUATE( cControlSource ) == OLDVAL( cControlSource ), and it does
>>>ALIAS IS NOT FOUND. I verified that the entry in .control_source exists as described above.
>>>
>>>TIA.
>>>
>>>UPDATE. the following code checks that the alias V_WORK exist and is open. This code, below, is before the code above (just in case someone wonders if the alias is indeed exists and open
>>>
>>>
>>>IF !EMPTY( this.control_source )
>>> cAlias = SUBSTR( ALLTRIM(this.control_source), 1, AT('.',ALLTRIM(this.control_source)) - 1)
>>> IF SELECT( cAlias ) > 0
>>> cControlSource = ALLTRIM( this.control_source )
>>> IF EVALUATE( cControlSource ) == OLDVAL( cControlSource )
>>> RETURN .T.
>>> ENDIF
>>> ENDIF
>>>ENDIF
>>>
>>
>>If someone has a test code (any kind of bogus code) that would generate an error
>>
>>ALIAS IS NOT FOUND
>>
>>I would appreciate it!
>
>Is it possible the error actually is [ALIAS '' IS NOT FOUND] i.e. it's a blank/empty alias/work area?
Yes, this generates the error I was looking for.
oldval('','')
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