- Many fixes to accomodate a nitty picky TRICS wishlist

- Added a log facility to scan which includes a variable which is logged but
  not driven during a scan.
- Fixed normal beam operation

tcldrivable.c

@@ -565,6 +565,7 @@ int TclDrivableInvoke(SConnection *pCon, SicsInterp *pSics,
   /*
     invoke and report
   */
+  memset(pError,0,132*sizeof(char));
   switch(functionIndex){
   case TCLHALT:
     if(!pDriv->Halt){