When switching Active Applications in Parker Automation Manager software, the Application for I/O handling is not switched automatically. Go into the device > PLC Settings to set the same as the active application.
Doing so will require a Clean All and Build before downloading.
Compile/Build error: C0032: Cannot convert type 'Unknown type: '{axis name}'' to type 'REFERENCE TO AXIS_REF_SM3'
10/31/17JH