I was able to setup the outbound profile and the port for IDOC processing in IS Retail. I ran RWDPOSIN (POS Outbound Initialization) before and all three idocs I need including WP_PLU02.
After SOME configurations, I tried to generate again all three idocs but suddenly WP_PLU02 cannot be generated. I used RWDPOSIN again and didn't change anything in the profile.
what could be the problem? we might have changed something with the article configuration.