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Also, you can alwys decode the access control conditions of ADF.USIM if you look at the file control template and/or the related EF.ARR record when SELECTing ADF.USIM. It should tell you under which conditions the creation of new files is permitted for the given currently selected DF.

laforge wrote in #note-1:

I guess this is more a question for the sysmocom customer support (support@sysmocom.de) than a question / problem of the pySim software.

Can you tell us if you have a SJA2v1 (90170...) or SJA2v2 (99970...)? AFAIR file creation was only supported in the latter version.

Thanks for your quick reply, I'm using SJA2v2 (99970...).

Here is the discription of ADF.USIM

pySIM-shell (MF)> select ADF.USIM
{
    "file_descriptor": {
        "file_descriptor_byte": {
            "shareable": true,
            "file_type": "df",
            "structure": "no_info_given" 
        },
        "record_len": null,
        "num_of_rec": null
    },
    "df_name": "a0000000871002ffffffff8907090000",
    "proprietary_information": {
        "uicc_characteristics": "71",
        "available_memory": 96484
    },
    "life_cycle_status_integer": "operational_activated",
    "security_attrib_compact": "00",
    "pin_status_template_do": {
        "ps_do": "70",
        "key_reference": 11
    }
}

Are you referring "security_attrib_compact": "00"? Does this attr mean I have no privilege to create a EF under ADF.USIM?
It would be great if you could share with me which DF are customized EFs placed generally!

Hey there,

I was facing the same issue as you, but while trying to deactivate option 124 of my SIMs. I knew it worked before and the ADM code was correct, and I found your bug with the same error as me.

I checked for an update to the pysim AUR package (on Manjaro), and lo and behold, there was an update that fixed this error for me. I hope updating your pysim version fixes the error for you as well.

BR