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I try to do

modparam("acc_json", "cdr_extra", "spx_resp=$avp(spx_resp)") modparam("acc_json", "cdr_json_pre_encoded_prefix", "spx_resp")

do restart and get next mistakes:

modparam("acc_json", "cdr_extra", "spx_resp=$avp(spx_resp)") modparam("acc_json", "cdr_json_pre_encoded_prefix", "spx_resp")

do restart and get next mistakes:

sep 22 14:17:15 vms-vms-spx-1 kamailio[581922]:

<!-- I am waiting normal start kamailio -->

### Troubleshooting

it's a bug at the documentation or in the code I see next: https://www.kamailio.org/docs/modules/devel/modules/acc_json.html#acc.p.cdr_...

But in the code I see a litle bit another https://github.com/kamailio/kamailio/blob/5.5/src/modules/acc_json/acc_json_...

Please fix it either in the code or documentation Now it works like this:

modparam("acc_json", "cdr_extra", "spx_resp=$avp(spx_resp)") modparam("acc_json", "cdr_pre_encoded_prefix", "spx_resp")

#### Reproduction

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#### Debugging Data

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#### SIP Traffic

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### Possible Solutions

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### Additional Information

* **Kamailio Version** - output of `kamailio -v`

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* **Operating System**:

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