Microsoft KB Archive/111673

ERR: Unable to Find Unknown  When  Is in Report PSS ID Number: Q111673 Article last modified on 02-18-1994

2.50 2.50a 2.50b | 2.00 2.50 2.50a 2.50b

WINDOWS | MS-DOS

= SYMPTOMS =

When you are building an application, it is not uncommon to receive a warning dialog box that indicates that FoxPro was unable to find a particular program, menu, report, or array. This error is often caused by a report that calls an array.

= CAUSE =

When this compiler error occurs, the EXTERNAL command is normally used to resolve this issue. According to the online help file, an array should be declared EXTERNAL under the following circumstances:

  When an array is created in an upper-level program and is used in a lower-level program. Sample Code ———– DIMENSION invoice(4) STORE ‘Paid’ to invoice DO dispinv ** Procedure that uses the array called invoice *** PROCEDURE dispinvo EXTERNAL ARRAY invoice ? invoice(1) ? invoice(2) ? invoice(3) ? invoice(4) RETURN   When passing an array to a user-defined function (UDF) or procedure. Sample Code ———– DIMENSION firstarray(2) EXTERNAL ARRAY arraytwo SET TALK OFF STORE 10 to firstarray(1) STORE 2 to firstarray(2) =ADDTWO(@firstarray) FUNCTION addtwo PARAMETERS arraytwo CLEAR arraytwo(1) = arraytwo(1) + 2 arraytwo(2) = arraytwo(2) + 2 ? arraytwo(1) ? arraytwo(2) RETURN 

When a report calls an array, the array is always EXTERNAL to the report. There is no way to fully implement either of the above methods because we cannot modify the code that is created to produce the report.

= RESOLUTION =

One possible resolution to this issue is to create a dummy procedure or function with the same name as the array that is called in the report. This procedure should never be called and should have no more than a RETURN statement. However, its existence will make the compiler quit looking for the array inside the report. In any instance where the array name is used, the FoxPro compiler will assume that we are making a call to the dummy procedure and not to an array that exists elsewhere. This will have no effect on the compiled application and the report will call the array as expected.

Additional reference words: 2.00 2.50 2.50a 2.50b unknown array report error message errmsg err msg

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Copyright Microsoft Corporation 1994.