I am working with Blaze 6.9 and i want to deploy my rules both in cobol and java environment at runtime.is it possible?
Cobol has a subset of built-in functions compared to Java. So your options are limited.
Why don't you try implementing a Java web service and invoke it from ur Cobol application, if you haven't explored this option?
KV is correct in stating that your options are limited. Blaze does however have that ability, though cobol support is sold separately (i.e. it will cost more).
There are a number of features that are not supported in cobol, so if you really want to deploy your rules to both Java and cobol you should read up on those feature differences in the documentation first.
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