From e4d625bf5aa62141738d1aac64554c694d7fd725 Mon Sep 17 00:00:00 2001
From: "stefan.poeter@cloud-automation.de" <stefan.poeter@cloud-automation.de>
Date: Mon, 23 May 2016 11:50:19 +0200
Subject: [PATCH] Fixed grouping problem.

---
 soem/ethercatmain.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/soem/ethercatmain.c b/soem/ethercatmain.c
index bdb3b73..54b67b8 100644
--- a/soem/ethercatmain.c
+++ b/soem/ethercatmain.c
@@ -1863,6 +1863,11 @@ int ecx_receive_processdata_group(ecx_contextt *context, uint8 group, int timeou
       pos = ecx_pullindex(context);
    }
 
+   if (pos == -1) {
+      context->idxstack->pushed = 0;
+      context->idxstack->pulled = 0;
+   }
+
    /* if no frames has arrived */
    if (valid_wkc == 0)
    {