FIX: Use "lite" CLR host on windows for 251+ (#920)

Co-authored-by: Mohamed Koubaa <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: pyansys-ci-bot <[email protected]>

doc/changelog.d/920.fixed.md

@@ -0,0 +1 @@
+Use "lite" CLR host on windows for 251+

src/ansys/mechanical/core/embedding/addins.py

@@ -52,9 +52,3 @@ def addin_configuration(self) -> str:
     @addin_configuration.setter
     def addin_configuration(self, value: str):
         self._addin_configuration = value
-
-
-def configure(configuration: AddinConfiguration):
-    """Apply the given configuration."""
-    if configuration.no_act_addins:
-        os.environ["ANSYS_MECHANICAL_STANDALONE_NO_ACT_EXTENSIONS"] = "1"

src/ansys/mechanical/core/embedding/initializer.py

@@ -95,12 +95,24 @@ def _get_default_version() -> int:
     return int_version
 
 
-def __check_python_interpreter_architecture():
+def __check_python_interpreter_architecture() -> None:
     """Embedding support only 64 bit architecture."""
     if platform.architecture()[0] != "64bit":
         raise Exception("Mechanical Embedding requires a 64-bit Python environment.")
 
 
+def __set_environment(version: int) -> None:
+    """Set environment variables to configure embedding."""
+    if os.name == "nt":  # pragma: no cover
+        if version < 251:
+            os.environ["MECHANICAL_STARTUP_UNOPTIMIZED"] = "1"
+
+        # TODO - use this on linux as well
+        if version >= 251:
+            if "PYMECHANICAL_NO_CLR_HOST_LITE" not in os.environ:
+                os.environ["ANSYS_MECHANICAL_EMBEDDING_CLR_HOST"] = "1"
+
+
 def __check_for_mechanical_env():
     """Embedding in linux platform must use mechanical-env."""
     if platform.system() == "Linux" and os.environ.get("PYMECHANICAL_EMBEDDING") != "TRUE":
@@ -157,7 +169,9 @@ def initialize(version: int = None):
 
     INITIALIZED_VERSION = version
 
-    __check_loaded_libs(version)  # pragma: no cover
+    __set_environment(version)
+
+    __check_loaded_libs(version)
 
     __workaround_material_server(version)
 

tests/embedding/test_dyna.py

@@ -37,6 +37,10 @@ def test_lsdyna(printer, embedded_app, assets):
     Runs only in Windows environment. This test involves
     a simple geometry with high velocity
     hitting on rigid wall.
+
+    Note - In order for standalone Mechanical to use LS-DYNA,
+           the lsdyna license needs to be at the top of the list.
+           Use the license preferences in Mechanical to set this up.
     """
     embedded_app.update_globals(globals())
     printer("Setting up test - LSDyna system")