UBB.classic is not designed nor intended to function properly on an NFS mount: Many NFS implementations have buggy, broken, or completely non-functional file locking schemes.
UBB.classic should be run only on a non-virtual, non-network filesystem. This is not a direct limitation of UBB.classic, but a policy we've had to enact after finding such problems with normal file locking on NFS shares. There are simply too many problems for it to work right.
The exact error, in this case, "No record locks available," indicates that the file locking process has run out of available locks to hand out, as is noted in the verbose error message. A quick googling confirms this.
![[Linked Image from navaho.infopop.cc]](http://navaho.infopop.cc/progress.gif)
