Need help with lazarus "Can't fork at command.pl"

Hello,

I'm trying to restore some deleted files from a system running solaris 8. I
followed the instructions from the help-recovering-file on the web site
under help.

First of all I ran the unrm command which created a 14 Gb file. I can see
the data I want to restore in the unrm_output file when I grep on certain
expressions. So far it looks good. 

Now, when I run the lazarus command:

/tmp/tct-1.14/bin/lazarus -D /b/blocks /export/home/xxx/unrm_output

it stops after a few hours with the message: Can't fork at
/tmp/tct-1.14/lib/command.pl line 98.

The last time I ran it, it created about 20000 files. But unfortunatelly the
data, which I could see in the unrm_output file, is not in these files. So,
I guess, the lazarus wasn't finished yet. 

Can anybody help me with this? I think, that there must be something like an
overrun somewhere. But where? 

Thank you

Wolfgang