# Cycle 2601 ProSim issue

**URL:** <https://forum.navigraph.com/t/cycle-2601-prosim-issue/22421>\
**Category:** General MSFS Data\
**Created:** [January 23, 2026, 5:24am UTC](https://forum.navigraph.com/t/cycle-2601-prosim-issue/22421 "2026-01-23T05:24:50Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![speedbird144](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/speedbird144/32/21040_2.png) [@speedbird144](https://forum.navigraph.com/u/speedbird144)\
**Post date:** [January 23, 2026, 5:24am UTC](https://forum.navigraph.com/t/cycle-2601-prosim-issue/22421/1 "2026-01-23T05:24:50Z")

</div>

Hi  
Once again, I cannot finish installation of AIRAC update. The installation process reaches conversion point 6/8 then it crashes. I cannot even start ProSIm anymore. Same problem was with the previous update. Something probably happened in the installation process in Navigraph. I never had such issues before.

---

<div class="post-metadata">

**Author:** ![NAVData](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/navdata/32/30549_2.png) [@NAVData](https://forum.navigraph.com/u/NAVData)\
**Post date:** [January 23, 2026, 6:34am UTC](https://forum.navigraph.com/t/cycle-2601-prosim-issue/22421/2 "2026-01-23T06:34:29Z")

</div>

Hi,  
Still not reproducible, sorry …

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/c/6/c63ececb68406684ec9030c5f94ae24a2b6058f0.png)

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/2/8/28057c229465dbd59ddab0ad29d568f47db9143d.png)

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/2/b/2b612aba34d6b6b15759486ddaf7fc92f7a844ec.png)

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/1/0/10469a794b71e1705a6cf7a2f645a1967fb46658.png)

What did Prosim answer in the previous cycle? You have opened a ticket …

What was the reason in 2513, and how have you solved it?

Cheers  
Richard

---

<div class="post-metadata">

**Author:** ![speedbird144](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/speedbird144/32/21040_2.png) [@speedbird144](https://forum.navigraph.com/u/speedbird144)\
**Post date:** [January 23, 2026, 4:06pm UTC](https://forum.navigraph.com/t/cycle-2601-prosim-issue/22421/3 "2026-01-23T16:06:52Z")

</div>

PS didn’t say anything. Some users report no issues, others the same problem, PS won’t start. Last tine I kept trying to start and the nav database eventually downloaded after like 3 days of trying. I will keep trying today and open another ticket.

---

<div class="post-metadata">

**Author:** ![speedbird144](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/speedbird144/32/21040_2.png) [@speedbird144](https://forum.navigraph.com/u/speedbird144)\
**Post date:** [January 23, 2026, 4:25pm UTC](https://forum.navigraph.com/t/cycle-2601-prosim-issue/22421/4 "2026-01-23T16:25:15Z")

</div>

The nav database has been finally loaded. It took me two days. Not sure what was happening. I will see what PS support has to say.  
Thanks

---

<div class="post-metadata">

**Author:** ![system](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/1X/4cc83e90d70ab312b1bd2d7527bddad309607265.png) [@system](https://forum.navigraph.com/u/system)\
**Post date:** [January 25, 2026, 6:17pm UTC](https://forum.navigraph.com/t/cycle-2601-prosim-issue/22421/6 "2026-01-25T18:17:37Z")

</div>

This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.