I've managed to create S19 files using the following command in my post build steps:
arm-none-eabi-objcopy --srec-forceS3 -v -O srec "${BuildArtifactFileName}" "${BuildArtifactFileBaseName}.s19"
However it will not produce S3 records as required by my tool even with the switch --srec-forceS3 in place. Is there any other way that I should be doing this to produce S3 records?