diff -up sblim-wbemcli-1.6.3/main.cpp.orig sblim-wbemcli-1.6.3/main.cpp
--- sblim-wbemcli-1.6.3/main.cpp.orig	2022-05-02 10:36:09.283825148 +0200
+++ sblim-wbemcli-1.6.3/main.cpp	2022-05-02 10:36:33.440858294 +0200
@@ -286,6 +286,7 @@ int main (int argc, char *argv[]) {
            op==GetProperty ||
            op==SetProperty ||
            op==CallMethod ||
+           op==CallMethodX ||
            op==ModifyInstance) && !xtraStr)
          throw CmdException("Invalid command invocation 2");