20.10 Data Sample Serialization Limits
Connext does not support sending samples with a serialized size bigger than 2,147,482,623 bytes. If you try that, you will see serialization and deserialization errors. Even if your type allows for samples bigger than 2,147,482,623 bytes (for example, you use the -unboundedSupport command-line option), the 2,147,482,623 limit still applies.