The P: path to Procs.cpp is just the path to where that Diablo II program code once was at Blizzard. It's there to help Blizzard debug things (105 is the line in the Procs.cpp source code that generated the error) and it's not that it tries to look at P: for anything on your drive. You don't have Procs.cpp, since only Blizzard has the source code.
The error message is correct though -- it can't find a file it's searching for. It looks like it's simply looking for Diablo II.exe which should be in your Diablo II directory.
If it's there, you might wish to go start RegEdit (Start Menu -> Run... -> type "regedit.exe") and look for HKEY_CURRENT_USER, then Software, then Blizzard Entertainment, then Diablo II. Then make sure all paths are looking correct there.
The error message is correct though -- it can't find a file it's searching for. It looks like it's simply looking for Diablo II.exe which should be in your Diablo II directory.
If it's there, you might wish to go start RegEdit (Start Menu -> Run... -> type "regedit.exe") and look for HKEY_CURRENT_USER, then Software, then Blizzard Entertainment, then Diablo II. Then make sure all paths are looking correct there.
<span style="color:orange">Account: jugalator // <span style="color:orange">Realm: Europe // <span style="color:orange">Mode: Softcore (kinda inactive nowadays though)
Loyal Diablo fan since 1997 :-)
Loyal Diablo fan since 1997 :-)