"COMMON in Quick Library Too Small": Use NAMED COMMON (43698)

SUMMARY

If the COMMON block in a main program module is larger than the COMMON block of a loaded Quick library subprogram, the error "COMMON in Quick library too small" occurs. In an executable (EXE) form (LINKed with an equivalent LIB), the error does not occur.

To work around this behavior, use a named COMMON block for the Quick library subprograms.

This information applies to QuickBasic versions 4.0, 4.0b, and 4.5, to the QB.EXE environment shipped with Microsoft Basic Compiler versions 6.0 and 6.0b, and to the QBX.EXE environment shipped with Microsoft Basic PDS versions 7.0 and 7.1.

Code Example

The following code example causes the "COMMON in Quick library too small" error when run in the environment; the workaround is described in comments.

Calling Program

COMMON a%, b%, c%        'workaround: COMMON /qlbcommon/ a%, b%
REM    So other programs can use also: COMMON a%, b%, c%
CALL test
END
				

Quick Library TEST.QLB

COMMON a%, b%            'workaround: COMMON /qlbcommon/ a%, b%

SUB Test

PRINT a%, b%

END SUB