diff --git a/Makefile b/Makefile
index dc943fe..38cc82e 100644
--- a/Makefile
+++ b/Makefile
@@ -54,7 +54,6 @@ PORT ?= 9022
 NETWORK ?= bridge
 CONTROLLER_HOST ?= $(shell dig +short $$HOSTNAME)
 CONTROLLER_PORT_SSH ?= 8022
-ASYNC=true
 run: $(DATA)
 	docker run -d --rm \
 	-p $(PORT):22 \
@@ -67,7 +66,6 @@ run: $(DATA)
 	--mount type=bind,source=$(PRIVATE),target=/id_rsa \
 	-e UID=$(UID) -e GID=$(GID) -e UMASK=$(UMASK) \
 	-e CONTROLLER=$(CONTROLLER_HOST):$(CONTROLLER_PORT_SSH) \
-	-e ASYNC=false \
 	$(TAGNAME)
 
 $(DATA)/testdata-production:
@@ -113,8 +111,6 @@ else
 endif
 	diff -u <(docker run --rm -v $(DATA):/data $(TAGNAME) ocrd workspace -d $(<F) find -G FULLTEXT -g PHYS_0017..PHYS_0021 -k url) <(for file in FULLTEXT/FULLTEXT_PHYS_00{17..21}.xml; do echo $(PREFIX)/$$file; done)
 
-test-ocrd-lib: SCRIPT = process_images.sh --proc-id 1 --lang deu --script Fraktur
-
 clean clean-testdata:
 	$(RM) -r $(DATA)/testdata* $(DATA)/ocr-d/testdata*
 
diff --git a/ocrd_lib.sh b/ocrd_lib.sh
index 07a3ee3..4e22df7 100644
--- a/ocrd_lib.sh
+++ b/ocrd_lib.sh
@@ -24,6 +24,9 @@ init() {
 
   PID=$$
 
+  WEBHOOK_RECEIVER_URL=""
+  WEBHOOK_KEY_DATA=""
+  
   cd /data
 
   logger -p user.info -t $TASK "ocr_init initialize variables and directory structure"
@@ -45,7 +48,6 @@ init() {
   # try to be unique here (to avoid clashes)
   REMOTEDIR="KitodoJob_${PID}_$(basename $PROCESS_DIR)"
 
-  WORKFLOW=$(command -v "$WORKFLOW" || realpath "$WORKFLOW")
   if ! test -f "$WORKFLOW"; then
     logger -p user.error -t $TASK "invalid workflow '$WORKFLOW'"
     exit 3
diff --git a/process_mets.sh b/process_mets.sh
index d97bca2..a81cfc8 100755
--- a/process_mets.sh
+++ b/process_mets.sh
@@ -40,7 +40,7 @@ where OPTIONS can be any/all of:
                           $RESULT_GRP
  --url-prefix URL         convert result text file refs from local to URL
                           and prefix them
- --webhook-receiver-url   url to the webhook receiver (ActiveMQ)
+ --webhook-receiver-url   url to the webhook receiver
  --help                   show this message and exit
 
 and METS is the path of the METS file to process. The script will copy
@@ -87,6 +87,8 @@ WEBHOOK_KEY_DATA="{\"metsPath\" : $METS_PATH}"
 (
   init_task
 
+  logger -p user.info -t $TASK "after init task"
+
   pre_clone_to_workdir
 
   pre_sync_workdir