To disable LJM's use of gRPC, set the LJM library configuration LJM_RPC_ENABLE to 0 (false). Do this before calling any Open or ListAll calls. This can be done in the startup configs or by writing using WriteLibraryConfigS.
For example, in C:
int error = LJM_WriteLibraryConfigS("LJM_RPC_ENABLE", 0);
if (error != LJME_NOERROR) {
// handle error
printf("LJM_RPC_ENABLE fail\n");
}
or, with LJM_Utilities.h:
SetConfigValue("LJM_RPC_ENABLE", 0);