ipc.writeSTR (0x3380, "test") and ipc.writeSW (0x32FA, 0) function in FSUIPC Support Pete Dowson Modules Posted July 11 · Report reply Hello Pete, I have a problem with the latest version of FSUIPC (FSUIPC6). My program worked very well with Prepar3D v4 and FSUIPC5 but now that I have switched to Prepar3D v5, I am forced to switch to FSUIPC6. The problem is that when I use the ipc.writeSTR (0x3380, "test") and ipc.writeSW (0x32FA, 0) function, my fps drop suddenly when displayed and they don't go back up. Is this a display optimization problem with FSUIPC6? It worked very well with FSUIPC5 and Prepar3D v4. Thanks in advance. Regards, Patrice."