Hi Andrea,

Using the octetstringascii instead of octetstring could have an impact. It depends on the values the old firmware contained and showed.

You can find more about these types in the NOTE sections of this page Type element | DataMiner Docs

But this is a short overview:

In the octetstring it will check if the value is outside the ASCII range and then the value will be represented differently on the moment it fall out of the ASCII range.

In the octetstringascii you know it will always be ASCII.

One note is that the read and write always need to be in the same type to prevent wrong octet values been created and wrong data is been send and read out of the device.

So I would recommend to double check if the old firmware only contained ASCII representable values.