Foxbase 2.1.2d in Sco Unix Open Server 5.0.7

Hi my name is Danilo.
I'm trying to install Sco foxbase + 2.1.2d. When i tried to install it with "custom" command, i receive the error:
"sed: cannot open: ./tmp/perms/prep/*/prep.message: No such file or directory (error 2)
The Operative System is Sco Open Server 5.0.7v (the virtualized version of unix).
Any ideas, i see in some forums that there are users who works with these software ... Thanks a lot.
Danilo.

the problem is that in either 5.0.4 or 5.0.5 the custom program was changed, and custom intall diskettes created earlier will not install.
If you have foxplus working on an old system use the /etc/perms/foxplus file as a guide to create a tar file of the required files, and then restore the files on the 5.0.7 system.
tar the files using absolute file names.
approximately:

 tar ctvf /tmp/fox.tar /usr/lib/foxplus /usr/bin/fox* 

Don't forget the termcap/terminfo entries if you need them.