I know that this used to be quite a common fault in the earlier versions of Arcserve for Netware. I've not got much in the way of experience of Brightstor for Netware, but the following document was always considered the "holy grail" when this error appeared on earlier versions. Hopefully it'll be able to shed some light on your problem!
Iain
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Problem Description:
After applying Novell NetWare Service Pack 8 or higher for NetWare 4.x, users receive error E0196 Invalid license file found.
Problem Resolution:
The introduction of NLS in service pack 8 has caused problems with some installs of ARCserve. When you have a mixed 5.x/4.x environment, the NLS extensions are in NDS and NLS is used on all servers. The requirement of using NLS is part of NDS and ARCserve has no control over its use.
To enable ARCserve to load successfully, Load setupnls.nlm at the console prompt. Then add the line "load nlslsp.nlm" to the Autoexec.ncf. Then shut down and restart the server.
Note: For additional information, see release notes from Novell's service pack 8.
Note: Please see Novell TID 10056641 for additional information or Novell's knowledge base on Installing NLS.