> For the complete documentation index, see [llms.txt](https://docs.solutioo.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.solutioo.de/gls-connector/gls-connector_en_us/faq-and-known-limitations.md).

# FAQ and known limitations

Answers to frequently asked questions and an overview of features that GLS Connector 26.13.40.0 deliberately does not cover.

## Frequently asked questions

**Does Test Connection create a test label?**

No. The action saves your entries and checks the sign-in at GLS. To get a test label, run a shipment in the sandbox.

**Can I use the same credentials for sandbox and production?**

No. Use separate GLS credentials.

**Does Smart Packing already book a shipment?**

No. After you confirm, Smart Packing only creates packages in Business Central.

**Does the app read weights from a scale?**

No. The weight comes from your master data and can be changed on the package card.

**Does the app automatically choose the cheapest product or a different carrier?**

No. The rate calculation uses your locally maintained GLS tariffs and does not compare them with other carriers.

**Are the calculated shipping costs binding?**

No. The GLS invoice is what counts.

**Is the delivery status updated in Business Central?**

No. Tracking opens the GLS link in the browser.

**Do I cancel a shipment by deleting the package?**

No. Uploaded packages cannot be deleted on the package card. Use **Cancel Parcel**.

**Which label format should I choose?**

PNG if you print several labels together from Business Central. PDF or Zebra if you download files or print directly to a label printer.

**Can I use different products within one multi-package shipment?**

No. Shipment-level data is taken from the first package. Upload packages with different settings separately.

**Why is my 45 kg package rejected?**

A fixed upper limit of 40 kg applies before upload. Check with GLS whether your contract actually allows packages up to this limit.

**Is the commercial invoice transmitted to GLS?**

No. Only the address, the country codes and the incoterm from the package card are transmitted. You prepare accompanying documents separately.

## Known limitations

| Topic                 | Limitation                                                                                                   |
| --------------------- | ------------------------------------------------------------------------------------------------------------ |
| Customs               | No electronic customs declaration, no CN23, no commercial invoice generation, no upload of customs documents |
| International data    | Local only; the incoterm must be set on the package card                                                     |
| Hazardous goods       | ADR: GLS hazard number and weight; LQ as a package service; no legal classification                          |
| Printing              | Built-in batch printing only with PNG images; no Universal Print integration                                 |
| Tracking              | Browser link, no ongoing status polling                                                                      |
| End of day report     | Manual, uses the work date, no posting in Business Central                                                   |
| Pickup                | Only via Pick\&Ship/Pick\&Return on the package; no separate pickup order                                    |
| Returns               | No complete return order or credit memo process                                                              |
| Package planning      | No full spatial optimization                                                                                 |
| Weight                | Fixed upper limit of 40 kg in the pre-check; weight changes at GLS are not guaranteed                        |
| Unclear upload result | Check the shipment status at GLS before trying again                                                         |
| Tariffs               | Only the app's Excel template; an import replaces the tariff details of the same code                        |
| Contract              | Countries, products, services and hazardous goods depend on your GLS contract                                |


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