Using the GSoC 2009 GUI tool compiled on Saturday November 28 2009
Intel mac running MacOS X 10.4.
It seems by default the output directory for that tool is out/, and if the directory does not exists, it returns an error:
$ ./tools_cli DOTT/Day\ of\ the\ Tentacle\ Data
Running using extract_scumm_mac
extracting 'MANIAC.OVL'
, saving as 'maniac.ovl'
Fatal Error : Could not open file out/maniac.ovl
$ mkdir out
$ ./tools_cli DOTT/Day\ of\ the\ Tentacle\ Data
=> runs fine
Because it is not possible to specify an output directory (see bug #2905462), this issue is very annoying.
I think it should either create the output directory if it does not exist or use as a default an existing directory (i.e. either the current directory or the input file directory).
Should be fixed now, thanks for reporting!