This article explains how to resolve error 93 when accessing a file.
When opening a file an error 93 is encountered saying:
File locked by another user
There are three main causes of this error:
Ungraceful exits. If the runtime exits in a manner that doesn't send a message to release the lock, the operating system will hold the lock until rebooted. On Windows Servers you can use the Administrative Tools > Computer Management > Shared Folders > Open Files to try to release locks on shared files. On UNIX/Linux copy the locked file to a different location, rename or delete the locked file and move the copied file back. For example:
cp myfile ../myfile
mv ../myfile myfile
Permissions problem. If the user has read-only permissions and the file is opened i-o this can cause the error 93.
Other software having the file locked such as anti-virus or backup software.