{"id":396197,"date":"2024-12-04T06:50:05","date_gmt":"2024-12-04T06:50:05","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/scade-replaces-values-with-null-in-textual-expressions-causing-check-failure\/"},"modified":"2024-12-04T12:43:35","modified_gmt":"2024-12-04T12:43:35","slug":"scade-replaces-values-with-null-in-textual-expressions-causing-check-failure","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/scade-replaces-values-with-null-in-textual-expressions-causing-check-failure\/","title":{"rendered":"SCADE Replaces Values with Null in Textual Expressions Causing Check Failure"},"content":{"rendered":"

<p><p>Hi Ansys Community,<\/p><p>I am a Test Engineer from mainland China, and I have encountered an issue with SCADE Suite during my testing process. Specifically, this issue occurs when opening a textual expression written in a certain way, which causes some values in the model to be replaced by null<\/code>, resulting in a check failure.<\/p><h3>Steps to Reproduce the Issue:<\/strong><\/h3><\/p><\/p>\n

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  1. Create Operator1(Input1: bool; Input2: bool)<\/code> which returns (Output1: bool)<\/code> and implements the functionality Output1 = Input1 or Input2<\/code>.<\/li>\n
  2. Create Operator2()<\/code> which returns (Output1: bool)<\/code>. Inside Operator2<\/code>, use a textual expression to call Operator1(true, false)<\/code> and directly connect it to Output1<\/code>.<\/li>\n
  3. Perform a check on Operator2<\/code>—it passes successfully, then save and close the SCADE project.<\/li>\n
  4. Reopen the project in SCADE. During the opening process, SCADE will display the message:<br>   “Expression calls fixed in project <prj_name.etp>: Operator2.xscade (1)”<\/strong><\/li>\n
  5. When performing the check again on Operator2<\/code>, an error is displayed:<br>    “Illegal Empty Parameter at _L1 = Operator1(_null, _null)”<br><\/strong>This issue is only observed when using value<\/code> directly as an input to the callee in the expression.<\/li>\n<\/ol>\n

    <p><h3>Expected Behavior:<\/strong><\/h3><p>Since I have made no modifications to the model, I expect that simply performing a check on Operator2<\/code> should not trigger any errors, and the check should pass successfully without any issues.<\/p><h3>Actual Behavior:<\/strong><\/h3><p>After reopening the model, checking Operator2<\/code> results in the error “Illegal Empty Parameter at _L1 = Operator1(_null, _null)”<\/strong>. The values passed into Operator1<\/code> should not be null<\/code> under normal circumstances.<\/p><h3>Environment:<\/strong><\/h3><\/p><\/p>\n

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    • SCADE Suite Version:<\/strong> 2023R1<\/li>\n
    • Operating System:<\/strong> Windows 10 Enterprise 22H2<\/li>\n<\/ul>\n

      <p><h3>Background:<\/strong><\/h3><p>This issue was discovered while using SCADE Suite in a minimal example that I created to reproduce the problem. The issue occurs under very basic conditions, meaning that it can be triggered by a very simple test project, as described above. I am happy to provide the .etp<\/code> and .xscade<\/code> files for further investigation.<\/p><p>I would appreciate any help or information regarding whether this issue is already known and if there is any existing workaround or fix available.<\/p><p>Thank you for your time and support!<\/p><\/p><\/p>\n","protected":false},"template":"","class_list":["post-396197","topic","type-topic","status-answered","hentry","topic-tag-SCADESUITE-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t