Size of value string block exceeds maximum capacity of 524280 bytes.

I am adding a large amount of entitity declarations and referencing them from a DTD. The compile fails with

"Size of value string block exceeds maximum capacity of 524280 bytes.

Document type definition is too complex

Compile failed - rc=64"

Just what capacity does this error refer to? I have tried various settings in the SGML Declaration, but the 524280 byte limit in the error message never changes. Is this an internal Arbortext limitation?

In the past, we have simply upped various capacity values in the SGML Declaration and got the desired result. But I can't see how to make this limit budge.

Any insight would be greatly appreciated.

Thanks. Debra Lee