It looks like this is not a generell issue within the test script.
The test script tries to increment the initial values. I suppose that the CTT was not able to generate the incremented values. Can you provide more information about the initial values (Datatype and value) of the variant elements in the cases the test script failed?

The array that does not work is an array of variants (length 6) with elements of types
123 (Int16)
123.0 (Double)
Tru1 (Boolean)
Marry, Sally and John (String)
123 (SByte)
123 (UInt16)
123 (UInt32)

The value written is an array of length 1 !! with an index range of (2,4)
The one and only value in this array is again an array of of type 3 (Byte).

It seems that CTT is not correctly incrementing an array of variants.

This CTT script produces another error because it reads back an array of locaized texts and gets different values than expected.
This issue is (again) very likely related to the preferred locales issue when trating localized texts (different locale in writing and perferred locales in session).

After discussions with the reporter, an issue has been identified in the function UaVariant.Increment if the function is called for arrays which contains arrays as elements. Because of this issue the function returned a too short array. This has been solved and will be available in the next version of the CTT.

reviewed in CMP call