- introduced header file dependency check

- improvements in ease drivers
- no "Counting finished" message in tas scan

tasscan.c

@@ -745,7 +745,7 @@ static int TASScanCount(pScanData self, int iPoint)
    */
   fVal = GetCounterPreset(self->pCounterData);
   eOld = GetStatus();
-  status = DoCount(self->pCounterData, fVal, self->pCon, 1);
+  status = DoCount(self->pCounterData, fVal, self->pCon, 2);
   iRet = Wait4Success(GetExecutor());
   if (iRet == DEVINT) {
     SCWrite(self->pCon, "Counting aborted due to Interrupt", eLog);
@@ -1322,6 +1322,10 @@ int TASScan(SConnection * pCon, SicsInterp * pSics, void *pData,
   if (!SCMatchRights(pCon, usUser))
     return 0;
 
+  if (pTAS->pScan->iActive) {
+    SCWrite(pCon, "ERROR: a scan is still running", eError);
+    return 0;
+  }
   /*
      check if we are a fast scan or a normal scan
    */