SSIS package parameter error in Runtime

I deployed a package 64bit runtime onto SSIS 2016. Package is to read csv files from a network folder and then store records in SQL database tables. Works fine in dev but in Live I get the error below:

server name path for csv files is \\Pimp-Of01\Top\Dropfolder\

server name path for csv files after processing with errora are moved to: \\Pimp-Of01\Top\Errorfolder\

Message
Executed as user: DOMAIN\phew. Microsoft (R) SQL Server Execute Package Utility  Version 13.0.1601.5 for 64-bit  Copyright (C) 2016 Microsoft. All rights reserved.    Option "-Of01\Top\Dropfolder\ /Par $Project::DatabaseNameContacts;MobileserviceDB /Par $Project::DatabaseNameDiary;DropDB /Par $Project::DestFolderERROR;\\pimp" is not valid.  The command line parameters are invalid.  The step failed.

If I look carefully at error message what comes after Option word supposed to be Pimp-of01 is -of01. what comes after the parameter ::DestFolderError; \\pimp. it does not evaluate in runtime to full path.

The standard reports\all executions does not show any entry at all.