5919 - MIPI D-PHY to CMOS Interface Bridge Soft IP: Why do I get this error message like this: "ERROR - IO register/latch csi2_to_cmos_inst/inst1_inst/lv_ff cannot be implemented in PIC."?

5919 - MIPI D-PHY to CMOS Interface Bridge Soft IP: Why do I get this error message like this: "ERROR - IO register/latch csi2_to_cmos_inst/inst1_inst/lv_ff cannot be implemented in PIC."?

Description:
This is caused by forcing a register whose input is being traced to be implemented as an input flip-flop because of a preference, USE DIN. 
 
Solution:
The user should allow the register to be implemented as an internal flip-flop by removing the preferences. 
 
Note: 
For new designs, Lattice recommends using the following modular IP blocks to implement this function:
  • CSI-2/DSI D-PHY Receiver
  • Byte to Pixel Converter