Issue with pcellEvalFaild warning on Layout Virtuoso IC6.1.6

Hello everyone,

I'm trying to do a layout of a simple inverter with my Virtuoso 6.1.6-64b, through the ams_cds tech : c18b4. When I try to import the instance from the schematic, it returns me a blinking warning on the workbench:
pCell Eval. Failed
If I follow Verify>>Marker>>Explain

it says me :

("dbCreateLabel" 0 t nil ("*Error* dbCreateLabel: Invalid layer/purpose" nil))

What can I do to solve the issue?

You can find attached a screenshot of the problem


Thanks a lot for the help.
Bests,

Giovanni

... If can be useful this is the Log of the problem:

*WARNING* (DB-270001): Pcell evaluation for cmrf7sf/pfetx/layout has the following error(s):
*WARNING* (DB-270002): ("dbCreateLabel" 0 t nil ("*Error* dbCreateLabel: Invalid layer/purpose" nil))
*WARNING* (DB-270003): Error kept in "errorDesc" property of the label "pcellEvalFailed" on layer/purpose "marker/error" in the submaster.
*WARNING* rodCreateRect: required argument "?layer" not specified or nil
*WARNING* rodCreateRect: command failed
*WARNING* rodCreateRect: required argument "?layer" not specified or nil
*WARNING* rodCreateRect: command failed
*WARNING* rodCreateRect: required argument "?layer" not specified or nil
*WARNING* rodCreateRect: command failed
*WARNING* rodCreateRect: required argument "?layer" not specified or nil
*WARNING* rodCreateRect: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodCreateRect: required argument "?layer" not specified or nil
*WARNING* rodCreateRect: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodCreatePath: required argument "?layer" not specified or nil
*WARNING* rodCreatePath: command failed
*WARNING* rodCreateRect: required argument "?layer" not specified or nil
*WARNING* rodCreateRect: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodAssignHandleToParameter: required argument "?rodObj" not specified or nil
*WARNING* rodAssignHandleToParameter: command failed
*WARNING* rodCreatePath: required argument "?layer" not specified or nil
*WARNING* rodCreatePath: command failed
*WARNING* (BND-2055): The 'permuteRule' property on cellview 'cmrf7sf/pfetx/layout' was ignored because it contains invalid terminal names - '(p D S)'.
*WARNING* (LX-2003): Cannot create instance terminal on layout instance '|TP0' because the instance master 'cmrf7sf/pfetx/layout' does not have a corresponding terminal 'B'.
*WARNING* (LX-2003): Cannot create instance terminal on layout instance '|TP0' because the instance master 'cmrf7sf/pfetx/layout' does not have a corresponding terminal 'D'.
*WARNING* (LX-2003): Cannot create instance terminal on layout instance '|TP0' because the instance master 'cmrf7sf/pfetx/layout' does not have a corresponding terminal 'G'.
*WARNING* (LX-2003): Cannot create instance terminal on layout instance '|TP0' because the instance master 'cmrf7sf/pfetx/layout' does not have a corresponding terminal 'S'.
*WARNING* (LX-2006): There were errors or warnings during layout generation.