Hello,  I don't see that error documented in the knowledge base or release notes so a few quick suggestions: 
When I try to install PP 5.5 P01, it fails with an MPIO error. PP 5.5 core install worked, just not the patch. I get :  "EMC MPIO For Windows Driver Installer has stopped working"    Has anyone else seen this?  Thanks.
Can not install Powerpath 5.5 P01 on Win08R2