Hey, I've also had similar frustrations with Pathfinder and newer models. The 1220 workaround works for some, but it's a hit or miss thing depending on the firmware.
One thing to try is to check if you're running the latest Pathfinder version, as some builds added partial support for newer H series unites. Also, double-check your interface cable and COM port settings since connection failures are often blamed on software when the hardware side is the culprit.
If Pathfinder keeps being problematic, you could try exploring dealer-level diagnostic tools. Some independent workshops that specialise in an electric forklift truck (https://lindemh.com.au/products/electric-forklifts) have found ways to work around these limitations using third party CAN tools. But then, your mileage may vary.
You need to check if Pathfinder is fully updated, and confirm if the dongle firmware is current. Older hardware may cause connection failures, so it could be a compatibility issue. If not, better to check with a specialist.
For reference on how the newer H series is different from older builds, this overview of the electric forklift truck range(https://lindemh.com.au/products/electric-forklifts) shows the changes from that period.
We have Linde LSG 8.13 with diagnosis full package if you need
1202 is lsg only and if you need to connect to the engine you will also need deutz unlocking in lsg which will not happen until you have revived the training