Have you heard of the Cache Project Database? (CPD file)
This file is actually a Microsoft Access Database file. If you have Microsoft Access, you should be able to open this file and examine the contents. As this file is edited by changing different aspects of your project, I believe it sometimes creates this LDB (Lock DataBase) file.
At least, that's my own understanding. Perhaps others will pop in to amplify, refute or offer different information.
This ldb file is in your \!SSL!\output folder or in the \project_name\ folder?
An .ldb is normally a "hidden" file which is automatically generated when the RoboHelp Project is opened (thus activating its .cpd cache file as Rick mentions.
The .ldb is referred to as a record lock to prevent users from editing the same data simultaneously and thereby avoiding unexpected data loss or corruption.
I'm still not clear on the problem. What comes after, " I get stopped by the RH file…" ? Something's missing here. A screenshot of the error message would help. Also, close the project. Delete the .cpd (and its companion ldb) file and reopen the RoboHelp project, then regenerate and see if the publishing works.
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@Jeff - It's usually a source file. I'd be pretty shocked to find it in the SSL output folder.
That’s what I was thinking – it wasn’t clear from the OP what they were doing, but it sounded like they were uploading generated content to a website…