Regular expression in file_spec does not match because file_path is examined instead of filename

^hs_err.+\.log$

2011-03-18 14:13:03.390 [debug] ..ftp server reply [nlist]: 257 "/home/test"
2011-03-18 14:13:03.406 [debug7] Processing file /home/test/hallo.txt
2011-03-18 14:13:03.406 [debug7] Processing file /home/test/hs_err_pid10406.log
2011-03-18 14:13:03.406 [debug7] Processing file /home/test/hs_err_pid10697.log
2011-03-18 14:13:03.406 [debug7] Processing file /home/test/hs_err_pid11756.log
2011-03-18 14:13:03.406 [debug7] Processing file /home/test/hs_err_pid1248.log
2011-03-18 14:13:03.406 [debug7] Processing file /home/test/hs_err_pid1409.log
2011

Regular expression should be

^.*hs_err.+\.log$

but this not what we want. Only the filename should be examined