VLD-1141: Internal error during mapping generation.

I am getting the "VLD-1141: Internal error during mapping generation" error when deploying a mapping. This mapping was previously working fine. As part of a re-factoring effort, for all the underlying tables and views, we replace 2 existing columns with a new column. All the objects were successfully re-imported and synchronized in the mapping. The mapping is using Mapping Input Parameter, Lookups, Expression Transformations, Splitter, Set Operator, Source & Target Tables. All these transformation were part of the earlier working version of the mapping.
On doing validation within the mapping, I get a success message followed by 4 warning for the Lookup Condition on key Lookup does not contain a complete unique key. Before the re-factoring effort, I was getting the same 4 warning messages, however the mapping was executing correctly.
When I do Generate within the mapping, I get the following message:
Code cannot be generated.
Click the message tab for details.
In the Design Center, when I do a validation on the mapping I get the following error:
VLD-1141: Internal error during mapping generation.
java.lang.NullPointerException
at oracle.wh.service.impl.mapping.component.Sequence.getSequenceExpressions(Sequence.java:138)
at oracle.wh.service.impl.mapping.component.Sequence.doSequenceValidation(Sequence.java:239)
at oracle.wh.service.impl.mapping.component.entity.EntitySqlDelegate.prepareOutputContext2(EntitySqlDelegate.java:123)
at oracle.wh.service.impl.mapping.component.entity.EntitySqlDelegate.prepareOutputContext2(EntitySqlDelegate.java:97)
at oracle.wh.service.impl.mapping.component.entity.EntitySqlDelegate.prepareOutputContext(EntitySqlDelegate.java:78)
at oracle.wh.service.impl.mapping.generation.WBMappingGenerator.generate(WBMappingGenerator.java:240)
at oracle.wh.service.impl.mapping.generation.PlSqlGenerationMediator.assembleSetBasedInternal(PlSqlGenerationMediator.java:2108)
at oracle.wh.service.impl.mapping.generation.PlSqlGenerationMediator.assembleSetBased(PlSqlGenerationMediator.java:2090)
at oracle.wh.service.impl.mapping.generation.PlSqlGenerationMediator.assemble(PlSqlGenerationMediator.java:541)
at oracle.wh.service.impl.mapping.generation.WBMappingGenerator.generate(WBMappingGenerator.java:798)
at oracle.wh.service.impl.mapping.generation.WBMappingGenerator.generate(WBMappingGenerator.java:335)
at oracle.wh.service.impl.mapping.generation.WBDeployableMappingGenerator.generate(WBDeployableMappingGenerator.java:102)
at oracle.wh.service.impl.generation.common.WBGenerationService.generateCode(WBGenerationService.java:433)
at oracle.wh.service.impl.generation.common.WBGenerationService.generateCode(WBGenerationService.java:311)
at oracle.wh.service.impl.generation.service.WhValidationGenerationTransaction.run(WhValidationGenerationTransaction.java:251)
Any help in this regards would be appreciated.
Naval

Hi,
I think your mapping is corrupted by converting two columns to one. The owb has always a problem if you change the structure of a table which is bound to a table operator. The way to avoid this is to drop the table operator after changing the table in the table editor and recreate it with the changed table definition.
Make a test: select the new attribut in the table operator and look left on the configuration window. To which table and attribute it's bound?
Regards,
Detlef

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