On June 12th, 2025, the new version 1.7.0 of our e-invoice REST API, Mustangserver, was published.
It introduces centralized exception tracking, i.e. errors affecting customers now immediately alert our technical support. Previously those messages were stored in logfiles, which had to be evaluated either occasionally or periodically.

The release brings all features and improvements of Mustang 2.17.0, upgrades PHIVE and supports more validation formats and upgrades to PDFBox 3.0.5, fixing a minor with certain PDF files (issue 217).