Hi! I have run R CMD check on a package on Windows 2000, Linux (Debian), Linux Mandrake. On all of this platforms the check runs without any warning. I send the package to a colleague. He runs R CMD check on his machine and gets errors eg. mscalibD.c:161: syntax error before `int' mscalibD.c:165: `i' undeclared (first use in this function) mscalibD.c:165: (Each undeclared identifier is reported only once Looking at the sources the answer is simple. His compiler is set to check if the C code is ANSII compliant. On my platforms the compilers are not set to check for this. Why? How can I tell R CMD check to check for this? I would find it usefully if R CMD check behaves with this respect similar on all platforms. Eryk. Dipl. bio-chem. Eryk Witold Wolski @ MPI-Moleculare Genetic Ihnestrasse 63-73 14195 Berlin 'v' tel: 0049-30-83875219 / \ mail: wolski@molgen.mpg.de ---W-W---- http://www.molgen.mpg.de/~wolski