# Rocket build fails with mspdbcore.dll missing

**URL:** <https://forums.unrealengine.com/t/rocket-build-fails-with-mspdbcore-dll-missing/429130>\
**Category:** Getting Started & Setup\
**Tags:** unreal-engine, ubt, compile, question\
**Created:** [July 10, 2018, 9:15pm UTC](https://forums.unrealengine.com/t/rocket-build-fails-with-mspdbcore-dll-missing/429130 "2018-07-10T21:15:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![HeavyBullets](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@HeavyBullets](https://forums.unrealengine.com/u/HeavyBullets)\
**Post date:** [July 10, 2018, 9:15pm UTC](https://forums.unrealengine.com/t/rocket-build-fails-with-mspdbcore-dll-missing/429130/1 "2018-07-10T21:15:58Z")

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Hey guys… i’m trying to create a rocket build for my plugin, and it won’t build anymore (something changed on my rig it seems)

The main error is this one:

```
    c1xx: fatal error C1356: unable to find mspdbcore.dllc1xx: fatal error C1356: unable to find mspdbcore.dll
    c1xx: fatal error C1356: unable to find mspdbcore.dll

```

Does anyone have any idea of what’s happening? i’ve tried reinstalling VS2017 but doesn’t work.  
Cheers

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<div class="post-metadata">

**Author:** ![HeavyBullets](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@HeavyBullets](https://forums.unrealengine.com/u/HeavyBullets)\
**Post date:** [July 10, 2018, 10:20pm UTC](https://forums.unrealengine.com/t/rocket-build-fails-with-mspdbcore-dll-missing/429130/2 "2018-07-10T22:20:29Z")

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Solved… had to install VS2015 toolchain from the VSInstaller and it worked.