Regarding problems with pmos characterisation

Hello, My name is Pawan Somashekar. I work as an Intern in Analog Design. I want to design an op-amp using Gm over Id method. In this case initially we have to characterise NMOS and PMOS transistors for various performance metrics like transconductance efficiency, transit frequency and so on. I  successfully characterised these for an NMOS transistors but when I'm simulating a PMOS transistor I'm encountering an error as show in the attached picture. I have tried several other ways to characterise the PMOS but I was unsuccessful. Kindly please help me. Thanks in Advance.