I'm working on a map, but when I start it ingame I get an exception. Debug info is below.

08.25.13 13:44:47 tool pc 01.00.00.0609 ----------------------------------------------
08.25.13 13:44:47 reference function: _write_to_error_file
08.25.13 13:44:47 reference address: 42ca20
08.25.13 13:44:47 Couldn't read map file './toolbeta.map'
08.25.13 13:44:47 file_open('tags\ui\ui_tags_loaded_solo_scenario_type.tag_collection') error 0x00000002 'The system cannot find the file specified. '
08.25.13 13:44:47 couldn't open tag_collection tag 'ui_tags_loaded_solo_scenario_type.tag_collection'.
08.25.13 13:44:47 failed to load ui tags tied to solo scenarios
08.25.13 13:44:47 WARNING: 1 clusters in structure_bsp levels\test\basis\basis have no background sound or sound environment.

It's a multiplayer scenario, so I'm not sure why it's looking for the solo ui tags. This likely has something to do with it, but I can't find the problem.

just open your maps .scenario in guerilla and change the drop down box from solo to multiplayer.

That's just it, it's set to multiplayer. I don't know why it's looking for the solo tags when the scenario is set to multiplayer.

You're missing a tag. Not sure where you get it, tho.