https://community.hpe.com/t5/operating-system-hp-ux/c-preprocessor/m-p/2531425#M869186 Under HP-UX 10.20 the C preprocessor treated lines starting with # which were not pre-processing directives as a string. Under Hp-Ux 11 the pre-processor tries to treat this as a pre-processing directive.<BR /><BR />Any ideas how to get round this.<BR /><BR /> Tue, 22 May 2001 14:50:59 GMT Angie Beswick 2001-05-22T14:50:59Z https://community.hpe.com/t5/operating-system-hp-ux/c-preprocessor/m-p/2531425#M869186 Under HP-UX 10.20 the C preprocessor treated lines starting with # which were not pre-processing directives as a string. Under Hp-Ux 11 the pre-processor tries to treat this as a pre-processing directive.<BR /><BR />Any ideas how to get round this.<BR /><BR /> Tue, 22 May 2001 14:50:59 GMT https://community.hpe.com/t5/operating-system-hp-ux/c-preprocessor/m-p/2531425#M869186 Angie Beswick 2001-05-22T14:50:59Z https://community.hpe.com/t5/operating-system-hp-ux/c-preprocessor/m-p/2531426#M869187 This is now resolved. HP-UX 11 defaults to ansi rather than K&amp;R. -Ac on compliation fixed the problem Wed, 23 May 2001 09:26:32 GMT https://community.hpe.com/t5/operating-system-hp-ux/c-preprocessor/m-p/2531426#M869187 Angie Beswick 2001-05-23T09:26:32Z