Hej Björn, so it did work in the development galaxy but not in our production galaxy. Here I get the following error in package_randfold_2_0 after successfully installing squid version 1.9g : randfold.c:24:18: error: squid.h: No such file or directory randfold.c:26:23: error: sre_random.h: No such file or directory randfold.c: In function 'main': randfold.c:30: error: 'SQFILE' undeclared (first use in this function) randfold.c:30: error: (Each undeclared identifier is reported only once randfold.c:30: error: for each function it appears in.) randfold.c:30: error: 'sqfp' undeclared (first use in this function) randfold.c:38: error: 'SQINFO' undeclared (first use in this function) randfold.c:38: error: expected ';' before 'sqinfo' randfold.c:89: warning: incompatible implicit declaration of built-in function 'strcpy' randfold.c:96: error: 'SQFILE_FASTA' undeclared (first use in this function) randfold.c:100: error: 'sqinfo' undeclared (first use in this function) randfold.c:103: warning: incompatible implicit declaration of built-in function 'malloc' randfold.c:103: warning: incompatible implicit declaration of built-in function 'strlen' randfold.c:136: warning: incompatible implicit declaration of built-in function 'fabs' randfold.c:158: warning: incompatible implicit declaration of built-in function 'free' make: *** [randfold] Error 1 Cheer Jochen