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### Description
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### Troubleshooting
#### Reproduction
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#### Debugging Data
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``` (paste your debugging data here) ```
#### Log Messages
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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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``` (paste your output here) ```
Can you get the output for gdb commands:
``` frame 1 p *xvbranch1 ```
``` (gdb) frame 1 #1 0x00007fc76f473b46 in tps_redis_load_branch (msg=0x7ffe8314d2a0, md=0x7ffe83148e40, sd=0x7ffe8314b030, mode=1) at topos_redis_storage.c:744 744 topos_redis_storage.c: No such file or directory. (gdb) p *xvbranch1 $1 = { s = 0x7fc700000000 <error: Cannot access memory at address 0x7fc700000000>, len = -2095805152} ```
Closed #1784.
I pushed the patch to master, 5.2 and 5.1 branches -- the issue was when trying to lookup the INVITE when processing the ACK to retrieve the routing information, no record was found and an unitialized field was used.
If this is not solving it, reopen.