diff --git a/src/datIf.cpp b/src/datIf.cpp
index 8496dfa..5658fde 100644
--- a/src/datIf.cpp
+++ b/src/datIf.cpp
@@ -1042,9 +1042,19 @@ char T_datif::loadRecDataFromFrame()
             epi_setDcDataValid();    // DC-Data are valid as DC responded.
                                         // Could be set to every response but this (31)
                                         // is a very common and very important request
-            gpi_storeDynMachineConditions(RdDleng, receivedData);
 
-            gpi_storeDI_CoinAttach(receivedData[6]);    // new, 14.2.24 needed for direct coin insertion
+            if (RdDleng > sizeof(struct T_dynamicCondition)) {
+                qCritical() << "!!!WARNING!!! RdDlen too high" << RdDleng;
+                // only use as many bytes as maximally possible
+                char buf[sizeof(struct T_dynamicCondition)];
+                memset(buf, 0, sizeof(buf));
+                memcpy(buf, receivedData, sizeof(struct T_dynamicCondition));
+                gpi_storeDynMachineConditions(buf);
+            } else {
+                gpi_storeDynMachineConditions(receivedData);
+            }
+
+            gpi_storeDI_CoinAttach(((struct T_dynamicCondition *)receivedData)->coinAttached);    // new, 14.2.24 needed for direct coin insertion
 
         }
         /* funktioniert, ist aber nicht nötig. Signal wird nach dem shared memory erzeugt