PowerBuilder 2019 R3 Build 2703

I have an Azure Devops TFS source control containing the latest PowerBuilder 2017 source code.

I have PowerBuilder 2019 R2 Build 2703 migrated PBLs, containing a slighlty older version of the PB 2017 source code.

I want to do a full Get Latest, but it continually fails because Azure Devops is useless with large PowerBuilder projects.

So, for the first time ever I decided to take a look ar OrcaScript, and it looks good. I wrote this bat file:

   @ECHO OFF
   REM Get everything from source control (Azure DevOps TFS)
   "C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\TF.exe" get "$/<MyProject>" /recursive /force

   REM Put the objects we just got into the PBLs
   orcascr190 /D runtime_version="19.2.0.2703" "_orca.txt"

   REM Do a build
   "C:\Program Files (x86)\Appeon\PowerBuilderCompiler 19.0\pbc190.exe" /d "<MyProject>.pbt" /o " <MyProject>.exe" /r "<MyProject>.pbr" /w y /f /m n /x 32 /bg y /p "<MyProjectName>" /cp "<MyCompanyName>" /de "<MyProjectShortName>" /cr "<MyCompanyName>" /v "<MyBuildNumber>" /vn "1.0.0.1" /fv "0 *this is not used nor is the Product version below*" /fvn "19.0.0.2703" /ge 0 /pd yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy /rt 19.2.0.2703
   @PAUSE

The OrcaScript script file contains this:

   start session
   set debug true
   scc set connect property logfile "OrcaBuild.log"
   scc set connect property logappend "FALSE"
   scc connect offline

   ; Tells the refresh to assume the source has already been
   ; extracted from TFS and to just import it
   scc set target "<MyProject>.pbt" "refresh_all importonly"

   ; Perform the imports
   scc refresh target "migrate"

   scc close
   end session

Which works great, gets everything from TFS, appears to import it all in the PBLS, and does a build.

But when I open the worksapce in the PowerBuilder 2019 R3 IDE I am prompted with:

The PowerBuilder Runtime version of the current IDE has changed. Do you want to full build the application using the new PowerBuilder Runtime version?

If I select OK then a full build is done and all is good from that point on. But I just did a full build, I believe. So what am I missing? Is there an object that needs to be checked in after the migration from PowerBuilder 2017 to 2019 R3, as I thought it was just the PBLs that change during migration?

Any help gratefully recieved :) Thanks!