The file $datei can't be found, aborts

The error occurred when executing:
 at C:/Perl/site/lib/PDF/Reuse.pm line 1231
	PDF::Reuse::findGet('$datei', '') called at blib\lib\PDF\Reuse.pm (autosplit into blib\lib\auto\PDF\Reuse\analysera.al) line 5856
	PDF::Reuse::analysera('$datei', 1, 3) called at blib\lib\PDF\Reuse.pm (autosplit into blib\lib\auto\PDF\Reuse\prDoc.al) line 3562
	PDF::Reuse::prDoc('HASH(0x187ad34)') called at C:/Dokumente und Einstellungen/Administrator/Eigene Dateien/Eclipse_Workspace/Perl/PDF/pdf.pl line 22

Situation when the error occurred

   Bytes written to the current pdf-file,    pos    = 15
   Object processed, not necessarily written objNr  = 3
   Current pdf-file,                         utfil  = DIE_NEUE_PDF.pdf-n
   File logging the run,                     runfil = undef
   Local time                                       = Mon Feb  7 16:58:37 2011