Table inheritance roots

I’m preparing a talk about table inheritance in AX 2012 and I wanted to know how many hierarchies exist in standard AX. Therefore I looked for all tables with SupportsInheritance = Yes and Extends = “”. It’s more than I expected (collected in AX 2012 R3): AgreementHeader AgreementHeaderExt_RU AgreementHeaderHistory AgreementHeaderHistoryExt_RU AgreementLine AgreementLineHistory AifDocumentFilter AifEndpointActionValueMap AifPort …

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XML DocType in X++

Let’s say that we want to use X++ to create an XML file with the following DocType definition: <!DOCTYPE MyType SYSTEM "http://www.validome.org/check/test.dtd"> AX has Xml* classes (e.g. XmlDocument) for such purpose, but let’s build it with .NET classes first (you’ll see why in a moment). This is X++ code calling .NET classes through .NET Interop: …

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Operand types are not compatible

I managed to produce a really confusing error in AX 2012. Look at the following piece of code: MyExtendedDataType a, b; a = b; Pretty boring, isn’t it? There is nothing to fail… except that I got a compilation error: Operand types are not compatible with the operator. What? Actually it become quite clear as …

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Compile backwards

Today I noticed that Type hierarchy browser in AX 2012 R3 allows you to compile types backwards: Context menu in AOT supports only forward compilation. It’s possible that the feature is there for some time and it just took me long time to notice it, because I normally don’t compile code from Type hierarchy browser.

Merging concurrent changes in AX with TFS

Suppose you’re an AX developer working in an AX instance shared by few other developers. You want to do some changes that would likely cause issues to your colleagues until they’re finished, therefore you’ve created a separate instance and work there. To simplify the example, assume that you’ve changed only a single method. If nobody …

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