Garry's Mod and -tools help

When I use the -tools command on garrysmod it gives me an error about p4lib.dll

I used -nop4 in the command line as well, so this isn’t an issue anymore. However, garrysmod wants to close as soon as it loads without error. I really want to use -tools to create a particle effect and don’t know how to get past this… Any help would be appreciated.