[Build 128] Build error when using Improve Existing Strategy

I am using StrategyQuant X Pro Build 127.153. I have tried loading several different strategies into the Improve Existing Strategy option in Builder. All of them stop with the following error message.

Regards,

William Hendy

06:39:21 Project finished

06:39:21 Finished in 2s

06:39:21 com.strategyquant.tradinglib.BlockDefinitionException: Cannot find block '#ExitAfterBars.ExitAfterBars#'

                at com.strategyquant.tradinglib.Blocks._get(Unknown Source)

                at com.strategyquant.tradinglib.Blocks.get(Unknown Source)

                at com.strategyquant.tradinglib.Blocks.get(Unknown Source)

                at com.strategyquant.tradinglib.Blocks.getBlockObject(Unknown Source)

                at com.strategyquant.tradinglib.gp.strategies.FixNonRandomBlocks.negate(Unknown Source)

                at com.strategyquant.tradinglib.gp.strategies.FixNonRandomBlocks.fixNonRandomElements(Unknown Source)

                at com.strategyquant.tradinglib.gp.strategies.FixNonRandomBlocks.apply(Unknown Source)

                at com.strategyquant.tradinglib.gp.EvolutionPipeline.apply(Unknown Source)

                at com.strategyquant.tradinglib.gp.GPGenerationalEngine.nextEvolutionStep(Unknown Source)

                at com.strategyquant.tradinglib.gp.GPGenerationalEngine.gpEvolution(Unknown Source)

                at com.strategyquant.tradinglib.gp.GPGenerationalEngine.evolve(Unknown Source)

                at com.strategyquant.tradinglib.gp.GPIslandJob.call(Unknown Source)

                at com.strategyquant.tradinglib.gp.GPIslandJob.call(Unknown Source)

                at com.strategyquant.gridlib.compute.performer.MultithreadComputePerformer$1.run(Unknown Source)

                at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)

                at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

                at java.base/java.lang.Thread.run(Thread.java:834)

06:39:21 -- Evolving generation 1 population for island #4

06:39:21 -- Evolving generation 1 population for island #5

06:39:21 -- Evolving generation 1 population for island #3

06:39:21 -- Evolving generation 1 population for island #2

06:39:21 -- Initial population for island #4 generated

06:39:21 -- Initial population for island #5 generated

06:39:21 -- Initial population for island #2 generated

06:39:21 -- Initial population for island #3 generated

06:39:21 Strategy 2.0.49

   - Main test - OK in 0.12 s.

   - initial generation, not saving to databank

06:39:21 Strategy 3.0.53

   - Main test - OK in 0.14 s.

   - initial generation, not saving to databank

06:39:21 Strategy 2.0.47

   - Main test - OK in 0.11 s.

   - initial generation, not saving to databank