Update class loading and compilation settings to use 'uk' package and enhance test fixture for unit tests

Author: grongierisc

src/iop/_utils.py

@@ -47,7 +47,7 @@ def setup(path:Optional[str] = None):
                 path = None
 
         if path:
-            _Utils.raise_on_error(_iris.get_iris().cls('%SYSTEM.OBJ').LoadDir(path,'cubk',"*.cls",1))
+            _Utils.raise_on_error(_iris.get_iris().cls('%SYSTEM.OBJ').LoadDir(path,'uk',"*.cls",1))
 
         # for retrocompatibility load grongier.pex
         try:
@@ -56,7 +56,11 @@ def setup(path:Optional[str] = None):
             path = None
 
         if path:
-            _Utils.raise_on_error(_iris.get_iris().cls('%SYSTEM.OBJ').LoadDir(path,'cubk',"*.cls",1))
+            _Utils.raise_on_error(_iris.get_iris().cls('%SYSTEM.OBJ').LoadDir(path,'uk',"*.cls",1))
+
+        # compile loaded classes by package (avoids parallel worker crashes in IRIS 2026.1+)
+        _Utils.raise_on_error(_iris.get_iris().cls('%SYSTEM.OBJ').Compile("IOP.*", 'cb'))
+        _Utils.raise_on_error(_iris.get_iris().cls('%SYSTEM.OBJ').Compile("Grongier.*", 'cb'))
 
     @staticmethod
     def register_message_schema(msg_cls: type):

src/tests/e2e/local/bench/settings.py

@@ -15,9 +15,10 @@
 # create a strings with current_dir and src_dir with a | separator
 classpaths = f"{current_dir}|{src_dir}"
 
-# load Cos Classes
+# load Cos Classes (load source first, then compile in a single pass)
 iris.cls('%SYSTEM.OBJ').LoadDir(os.path.join(
-    current_dir, 'cls'), 'cubk', "*.cls", 1)
+    current_dir, 'cls'), 'uk', "*.cls", 1)
+iris.cls('%SYSTEM.OBJ').Compile("Bench.*", 'cb')
 
 CLASSES = {
     "Python.BenchIoPOperation": BenchIoPOperation,

src/tests/e2e/local/test_dtl.py

@@ -11,7 +11,8 @@
 # Fixtures
 @pytest.fixture
 def load_cls_files():
-    _Utils.raise_on_error(iris.cls('%SYSTEM.OBJ').LoadDir(TEST_DATA_DIR, 'cubk', "*.cls", 1))
+    _Utils.raise_on_error(iris.cls('%SYSTEM.OBJ').LoadDir(TEST_DATA_DIR, 'uk', "*.cls", 1))
+    _Utils.raise_on_error(iris.cls('%SYSTEM.OBJ').Compile("UnitTest.*", 'cb'))
 
 @pytest.fixture
 def iop_message():