diff --git a/helpers/create-abi-bump.py b/helpers/create-abi-bump.py
--- a/helpers/create-abi-bump.py
+++ b/helpers/create-abi-bump.py
@@ -51,7 +51,8 @@
         """
         _args = args.split()
         if len(_args) == 2:
-            variables[_args[0]] = _args[1]
+            name, value = _args
+            variables[name] = value
 
     def parse_set_target_properties(args: str) -> None:
         """process set_target_properties cmake lines and update the targets directory
@@ -62,9 +63,9 @@
         args[0] is the target we want to update
         args[1] must be PROPERTIES
         """
-        _args = args.split()
-        target = targets[_args[0]]
-        if not _args[1] == "PROPERTIES":
+        name, properties, values = args.split()
+        target = targets[name]
+        if not properties == "PROPERTIES":
             logging.warning("unknown line: %s"%(args))
 
         # Known set_target_properties keywords
@@ -78,7 +79,7 @@
         ]
 
         tmpKeyword = None
-        for arg in _args[2:]:
+        for arg in values:
             if arg in keywords:
                 tmpKeyword = target[arg]
                 continue
@@ -124,11 +125,10 @@
         with tempfile.TemporaryDirectory() as d:
 
             # Create a CMakeLists.txt that depends on the requested library
-            with (pathlib.Path(d)/"CMakeLists.txt").open("w") as f:
-                f.write("find_package({self.name} CONFIG REQUIRED)\n".format(self=self)) # replace with f-String in python 3.6
-
-            proc = subprocess.Popen(['cmake', '.', '--trace-expand'], cwd=d, stdout=subprocess.DEVNULL, stderr=subprocess.PIPE)
+            cmakeFile = (pathlib.Path(d)/"CMakeLists.txt")
+            cmakeFile.write_text("find_package({self.name} CONFIG REQUIRED)\n".format(self=self)) # replace with f-String in python 3.6
 
+            proc = subprocess.Popen(['cmake', '.', '--trace-expand'], cwd=d, stdout=subprocess.DEVNULL, stderr=subprocess.PIPE, check=True)
 
             # search only for lines that are the output of the specifc cmake files
             self.__mlines = []    #  type: List[str]
@@ -204,7 +204,7 @@
             f.write(xml)
 
         # acc is compatible for C/C++ as Qt using C++11 and -fPic we need to set the gcc settings explitly
-        subprocess.call(["abi-compliance-checker", "-gcc-options", "-std=c++11 -fPIC", "-l", self.name, "--dump",f.name])
+        subprocess.check_call(["abi-compliance-checker", "-gcc-options", "-std=c++11 -fPIC", "-l", self.name, "--dump",f.name])
 
 
 # search in buildlog for the Installing/Up-to-date lines where we installnig the <name>Config.cmake files.