file type not recognized

If it is related to ProjectWise then ask in  ProjectWise Design Integration Forum 

You have to assign correct MIME types and reset any custom assignments by user.

I can't say either way if I found the solution. MWLong's suggestion of creating a new file and referencing in the file in question seems familiar. I may have taken that route. A couple of things you can try would be to check your associations in PW. You may also want to consider reinstalling projectwise. I just ran across a situation in which PW would open any file except dgns. Sorry I can't give you more help than that.

Hi Josh,

Did you find any solution for the concern? I am facing the same issue at my end.

Using managed workspace and OpenRoads Designer.

Thanks
Deepak Singh

The message states that "MicroStation" cannot open the file.

Are you using MicroStation or OBD ? 

found this:

https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/48343/openbridge-designer---new-file-format-obdx-in-v10-08-01

It seems that the OBDX file is specific to open bridge - so if you are attempting to use it in MicroStation it will not work - however - if you are attempting to open with open bridge and getting an error, then I would post this issue in the Open Bridge forum.

Most likely the file is corrupt. Try to reference it to another file. If it references fine then start a new blank file from a good seed file then reference the file to it and merge it into the new file. The corruption is probably some non-graphical data. If that does not hopefully you have a backup file.