Currently the online submission xml file has a limit of up to 500K claims accepted within one file.

There is an approximate 25Mb size limit on the xml file, although this is not a hard limit and will offer a little give. E.g. NDCS processed an 83K record claim run, file size of 25.8Mb which was successful however processing a 100K run would increase the file size by several Mb’s and would ultimately fail. 

The request is to improve compression performance to allow CRM to process a greater volume of records within one submission.