Release Notes

v5.26.4 on the GitHub



  • An ability to test custom error messages via test tables is added.
  • Memory usage in SmartRules parsing is improved.
  • Warnings are now displayed for matching arguments with the same name that is written in different cases (lower case and upper case).

Rule Services:

  • In Rule Services, the 'locale' context variable value is now retrieved from the 'Accept-Language' HTTP header.
  • Depending on the browser language settings, OpenL Tablets Rule Services return a response according to localization defined in the OpenL rules.

  • It is now possible to customize system error responses by overriding the default JAXRSExceptionMapper.
  • Return arrays of errors as is, without wrapping into the object with 'body' property


  • An ability to navigate to a browser after double clicking the start script is added.
  • The 'Tutorial 8 - Introduction to Smart Rules and Smart Lookup Tables' project is opened and the 'Tutorial 4 - Introduction to Column Match Tables' project is closed.
  • Migration to the new OpenL Tablets DEMO version without manually copying the openl-demo folder is now available.

Fixed Bugs


  • The StackOverflow error is displayed if the return parameter is calculated from other return parameters.
  • Slashes in condition syntax do not work properly in simple rules.
  • 8 errors instead of 1 are displayed to a user if the external project or module is specified incorrectly or does not exist in smart rules.
  • Extra errors are displayed when a non-existing enum property is added to a table.
  • No validation is performed if incorrect parameters are passed to the constructor.
  • No error is displayed if a non-existing method is called and there is an alias in the project with the name equal to the method name.
  • The "'_res_' column is missing." warning message is displayed for the run table.
  • The 'StringIndexOutOfBoundsException' or 'ArrayIndexOutOfBoundsException' exception is displayed if spreadsheet steps contain special symbols only.
  • Incorrect casting of primitive is selected between an object and number.
  • The StringRange condition is parsed as a string if the backslash or period symbols are used.
  • The StringRange condition is parsed incorrectly if the border value contains a space and the part after space length exceeds 99 symbols.
  • The classloader issues appear when OpenL Tablets WebStudio is run on the Jetty application server.


  • Infinite loading is displayed after adding a comma to an array.
  • An internal server error appears if a user applies the Level = "None" filter in the filter project section.
  • ClassCastException appears on opening a dependent project if for the main project, the module is opened in Excel.
  • An error is displayed on loading the module if there are two parameters with the name "input".
  • The 'Cannot load the module' error is displayed when a project has different dates set for the same datatypes in modules.
  • The " Cannot convert from 'org.openl.rules.calc.AnySpreadsheetResult' to 'org.openl.rules.calc.SpreadsheetResult'. " error is displayed if custom.spreadsheet.type = false.
  • OpenL Tablets WebStudio breaks Git repository with submodules.
  • The datatype in C2 condition parameter is not underlined if the condition is merged with C1.
  • Local history is lost after copying a project.
  • If OpenL Tablets WebStudio uses the Postgres database, the project is displayed for two tag filters if it was deleted, erased, and then re-created with another tag in another repository.
  • Tests fail when a null element exists in the string array.
  • An inconsistent deploy configuration name is displayed on the Admin tab in the 'Deploy configuration repository' list.
  • The "java.lang.StringIndexOutOfBoundsException" error is displayed when a table contains a method that cannot be found.


  • Folder "-p" is created in a demo folder on Windows.
  • Two icons are displayed for the running DEMO process in MacOS.
  • The "RESTful Rule Services" link does not work for Rule Services demo client.
  • The 'stop.cmd' script is removed as it does not work properly.

DEMO, WebStudio:

  • The SetNonZeroValuesTest test in the 'Example 1- Bank Rating' project does not return the expected result.

DEMO, Docker:

  • The force-recreate script does not work for a demo container.

Rule Services:

  • The project deployment fails with NPE if custom.spreadsheet.type is set to false in properties.
  • The 200 and 204 responses disappear from the OpenAPI scheme if the method has the ‘@Operation’ annotation.
  • The OpenAPI schema contains a wrong default value for the 'array' type.


  • The local Git repository stops responding if a tag in the remote repository is repushed.

Maven Plugin:

  • Maven plugin does not work with Maven 3.5.4.

Updated Libraries

Vulnerabilities fixed: CVE-2022-40151, CVE-2022-40152, CVE-2022-40153, CVE-2022-40154, CVE-2022-40155, CVE-2022-40156, CVE-2022-31684, CVE-2022-38752

  • Spring 5.3.24
  • Spring Boot 2.7.7
  • Spring Security 5.8.1
  • Swagger UI 4.15.5
  • Log4j 2.19.0
  • Cassandra driver JDBC 4.15.0
  • Thrift 0.17.0
  • Netty 4.1.86.Final
  • Reactor Netty HTTP 1.1.1
  • Kotlin stdlib 1.7.22
  • Jackson 2.14.1
  • Jetty 10.0.13
  • AWS S3 SDK S3 1.12.376
  • Azure Blob Storage 12.20.1
  • MSSQL JDBC driver 11.2.2.jre11
  • Hibernate ORM 5.6.14.Final
  • Mokito 4.9.0
  • Datasource Proxy 1.8.1
  • Testcontainers 1.17.6
  • GreenMail Core 1.6.12
  • Commons compress 1.22
  • Gson 2.10
  • Apache Groovy 3.0.14
  • Apache POI 5.2.3
  • Bouncycastle 1.72
  • Joda Time 2.12.2
  • snakeYAML 1.33
  • CXF 3.5.5
  • Woodsox 6.4.0
  • Dependency on XStream library was removed

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