All, as ever, many thanks for the responses. I have now fixed the problem. The code I have chosen is as follows:

chdir "C:\\Program Files\\Analysis\\Auditfiles" or die "ERROR!: $!"; 
system ("del *.audit");
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I tried to install File::Chdir but unfortunately received a whole load of errors during nmake test that I couldn't fathom. This was a non-starter. Also, I tried using unlink and glob together, but while this compiled, it didn't actually delete anything. I realise chdir is bit crude, but the script I am using it in is very simple. Thanks again!