You can compile your ASN.1 files using your earlier version of the OSS ASN.1 compiler with the -keepNames option specified. This option will instruct the compiler to produce a .gen file containing global compiler directives for name preservation.
Then, you can use your newer version of the OSS ASN.1 compiler to re-compile your ASN.1 syntax passing the produced .gen file as the first command-line argument. The resultant output file will contain the same names as produced with a prior version of the OSS ASN.1 compiler.
The samples included with some of the Knowledge Center answers are meant for your general understanding of the OSS products. Different versions of the products might produce slightly different outputs. Consult the products documentation and samples for the most up-to-date products information and code examples.
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