When compiling DLC2SoulStealScript from Dragonborn, the Papyrus compiler throws an error if you attempt to compile it with the optimization flag set in the batch file. ( -op )

It compiles without issue if the flag is off.

http://pastebin.com/gZnXYaFE Line 435 is where the error comes up.

Compiling "DLC2SoulStealScript"...Starting assembly of DLC2SoulStealScriptDLC2SoulStealScript.pas(435) : error: Error reading argument 5: Unknown assembly argument1 error(s), 0 warning(s)Assembly failedNo output generated for DLC2SoulStealScript.psc, compilation failed.

I thought it curious since it's the only script this has ever happened on so far. Maybe something needs a bit of tweaking in the compiler.