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<redirinstance> - Fixed COBOL Error 9A (file locked) with Micro Focus

A COBOL program that attempted to create a line-sequential file failed with error 9A (file locked) if the DYNREDIR environment variable was set to CTEXTFH library and <redirinstance> was configured to use Micro Focus library MFFH (<redirinstance lib="cobmffh64.3.so" func="MFFH">).

This is a complex situation involving a loop created by the redirection and CTEXTFH and MFFH libraries. To resolve this situation, the MFFH library no longer manages the operation so that it is handed to the next file handler and eventually to the default Micro Focus file handler.

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