RSCAN is not working with PLLOUT clock as module clock (pclk)

I am working on the RH850 F1KM S1 controller. CAN is working fine when it is configured with Main source and Emergency clock as module clock(pclk). When it is configured with PPLL1OUT clock as module clock(pclk), CAN is not working. I am using xinclk for the baudrate generation. what could be the reason?