Compiler warnings during recompilation, is this expected?

Hello NONMEM users, I am seeing compiler warnings during recompiling stage of NONMEM 7.2.0 runs. Is this expected? Or should I take this as a sign that something is wrong? I am using Linux (Ubuntu) and G95. best regards, Douglas Eleveld <snip start> Recompiling certain components /home/deleveld/nm72/pr/SADVAN.f90: In function 'sadvan_': /home/deleveld/nm72/pr/SADVAN.f90:509: warning: will never be executed /home/deleveld/nm72/pr/SADVAN.f90:401: warning: will never be executed /home/deleveld/nm72/pr/SADVAN.f90:356: warning: will never be executed /home/deleveld/nm72/pr/ADVAN11.f90: In function 'advan_': /home/deleveld/nm72/pr/ADVAN11.f90:585: warning: will never be executed /home/deleveld/nm72/pr/ADVAN11.f90:534: warning: will never be executed /home/deleveld/nm72/pr/ADVAN11.f90:484: warning: will never be executed /home/deleveld/nm72/pr/CHECK.f90: In function 'check_': /home/deleveld/nm72/pr/CHECK.f90:464: warning: will never be executed /home/deleveld/nm72/pr/PREDI.f90: In function 'predi_': /home/deleveld/nm72/pr/PREDI.f90:891: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90: In function 'pred_': /home/deleveld/nm72/pr/PRED.f90:2011: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1874: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1863: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1851: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1836: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1800: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1747: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1671: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1485: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1414: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1402: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1390: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1375: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1269: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1266: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:1152: warning: will never be executed /home/deleveld/nm72/pr/PRED.f90:673: warning: will never be executed /home/deleveld/nm72/pr/CHECK.f90:165: warning: will never be executed /home/deleveld/nm72/pr/TRANS4.f90: In function 'trans_': /home/deleveld/nm72/pr/TRANS4.f90:169: warning: will never be executed /home/deleveld/nm72/pr/ADVAN11.f90:630: warning: will never be executed /home/deleveld/nm72/pr/PREDI.f90:459: warning: will never be executed Exit status = 0 <snip end> deleveld@i7:~$ g95 -v Using built-in specs. Target: Configured with: ../configure --enable-languages=c : (reconfigured) ../configure --enable-languages=c Thread model: posix gcc version 4.1.3 (g95 0.93!) Jun 16 2010 ________________________________