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JIT Error?

Did you know? Since BC 22 we are facing an issue which we call "JIT Error".


If you run Rec.CalcFields on a page to "calculate" a blob, next time you change the Record you will get the following error:


You can easily reproduce that issue with our repo:


Wait... JIT?


Yes! JIT means Just-In-Time.

"When a record is loaded as a partial record, the obvious question is: What happens when accessing a field that hasn't been selected for loading?

The answer is JIT loading. The platform, in such a case, does an implicit Get on the record and loads out the missing field."




This error occurs by using the following Version:



Our Test Scenarios:

  • Test Page 1:

    • OnAfterGetRecord -> Rec.CalcFields -> Error


  • Test Page 2:

    • OnAfterGetRecord -> NewRec = Rec -> NewRec.CalcFields -> No Error


  • Test Page 3:

    • SelectLatestVersion in OnAction trigger -> OnAfterGetRecord -> Rec.CalcFields -> No Error


  • Test Page 4:

    • Blob Field shown on the Page -> OnAfterGetRecord -> Rec.CalcFields -> No Error


  • Test Page 5:

    • Blob Field hidden on the Page -> OnAfterGetRecord -> Rec.CalcFields -> No Error


First Test:

To reproduce the error in the first test page 62001:

  • Open the page

  • Add some entries as shown:


  • Mark the second or third entry

  • Click on “Run Action” (two times) o First time: Test Bool will be switched to “true” o Second time: Error



Second Test:

To reproduce the error in the first test page 62001:

  • Reopen the page after you got the error.

  • The second entry (if selected before) has Test Bool set to true now:


  • Mark the second entry

  • Click on “Run Action” (the error will come up directly and the page will be closed; then you can’t start the page again until you clean your cache)

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