Added warning when co_dcli_file fails to resolve an environment variable.

src/lib/co/src/co_dcli_file.c

@@ -177,6 +177,9 @@ int dcli_replace_env(const char* str, char* newstr)
         cdh_ToLower(lower_symbol, symbol);
       if ((value = getenv(lower_symbol)) == NULL) {
         /* It was no symbol */
+        if (strncmp(str, "$pwr", 4) == 0) {
+          fprintf(stderr, "Warning! Could not resolve environment variable $%s\n", lower_symbol);
+        }
         *t = *s;
         t++;
       } else {
@@ -206,6 +209,9 @@ int dcli_replace_env(const char* str, char* newstr)
       cdh_ToLower(lower_symbol, symbol);
     if ((value = getenv(lower_symbol)) == NULL) {
       /* It was no symbol */
+      if (strncmp(str, "$pwr", 4) == 0) {
+        fprintf(stderr, "Warning! Could not resolve environment variable $%s\n", lower_symbol);
+      }
       *t = 0;
     } else {
       /* Symbol found */