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Middleware 1.3.18 (Germany)

· 3 min read
PosCreator Experience Team

This Middleware version contains bug fixes for issues that could occur when using Swissbit Cloud or Deutsche Fiskal TSEs behind a proxy server, a stability improvement for our CryptoVision SCU to handle Windows' USB power saving mode, and a minor improvement for generating TSE order payloads.

Stability improvement: Improved USB power-saving mode handling for CryptoVision TSEs

Some of our partners reported very infrequent errors with CryptoVision TSEs, with the logs hinting that the TSE was not responding with an appropriate data header. After clarifications with the vendor, this might be related to the TSE being switched into USB power saving mode by Windows - which of course increases the response time.

The typical error message for this problem is: Response headers didn´t match. Expected <QWRWYW5jRUQgU2VDdVJlIFNEL01NQyBDQXJkAQ==>, but instead got <AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==>.

According to our logs, this issue occurred very rarely, but some systems were disproportionately affected. This might be dependent on the OS or system configuration.

While the Middleware is usually able to handle one-time TSE errors with it's inbuilt retry mechanisms, this issue is particularly critical, as the TSE actually processes the transmitted data. However, since the Middleware ist not able to read the response, this leads to different consequential errors, depending on the failing operation.

In the worst case, a finish transaction request was affected, which could block daily-closing receipts in some cases (as the transaction is marked open in our database, but closed on the TSE). We've added an additional ftReceiptCaseFlag (0x0000000020000000) to the daily-closing receipt that can be used to resolve this situation.

Bug fix: Configured proxy server is not used for downloading Fiskal Cloud Connector

When running the Middleware behind a proxy server and using the Middleware's automatic FCC download capabilities, the proxy parameters that were specified for fiskaltrust.exe were ignored in some cases, rendering it impossible to automatically download and setup the FCC. This issue (which affected both the Swissbit Cloud and the Deutsche Fiskal SCUs) has been resolved.

Bug fix: TSE process data was not computed correctly for some rare info-order cases

The process data of info-order receipts (which end up as Bestellung-V1 on TSEs) was not computed correctly in some rare cases; namely, when a ChargeItem.Amount of 0.00 was sent, the Middleware sent this as .00 to the TSE (instead of 0.00). This issue has been resolved.

Affected packages

Packages not listed here were not updated, as we decided to not increase the version of unchanged packages. All packages with versions greater or equal to 1.3.1 are compatible with each other (it is e.g. possible to use fiskaltrust.Middleware.SCU.Swissbit.1.3.1 with the new queue packages).

  • fiskaltrust.Middleware.Queue.EF v1.3.18
  • fiskaltrust.Middleware.Queue.MySQL v1.3.18
  • fiskaltrust.Middleware.Queue.SQLite v1.3.18
  • fiskaltrust.Middleware.SCU.DE.SwissbitCloud v1.3.18
  • fiskaltrust.Middleware.SCU.DE.DeutscheFiskal v1.3.18
  • fiskaltrust.Middleware.SCU.DE.CryptoVision v1.3.18-rc1

Next steps in the Middleware

We will continue to improve the stability of our Middleware in the next sprints. As always, we're happy to hear feedback and suggestions via or directly via issues in our GitHub repositories.