In the workstation (where these files where created and updated), with the same code as in the server, these files are opened and closed without problems.

Hence, it seems most probably a problem with the BDB version or platform.

• First, please check the MD5 of the file on both hosts, so you're sure that are identical.
• Then, see what file command says about the BDB file on each host.
• Finally make sure that the BDB libraries have the same version.

I'd bet that the server has a newer version than the workstations since it has Solaris 10.