# NoClassDefFoundError for some SDK 1.2 classes

**URL:** <https://forum.universal-robots.com/t/noclassdeffounderror-for-some-sdk-1-2-classes/1855>\
**Category:** URCaps SDK\
**Created:** [April 9, 2018, 11:11am UTC](https://forum.universal-robots.com/t/noclassdeffounderror-for-some-sdk-1-2-classes/1855 "2018-04-09T11:11:51Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![anon46802796](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@anon46802796](https://forum.universal-robots.com/u/anon46802796)\
**Post date:** [April 9, 2018, 11:11am UTC](https://forum.universal-robots.com/t/noclassdeffounderror-for-some-sdk-1-2-classes/1855/1 "2018-04-09T11:11:51Z")

</div>

Hello to all,  
I’m having some issues using the new features introduced since the SDK 1.2.

I’m following the samples _idletime_ and _cyclecounter_ and after reading [Read variables set by assignment](https://forum.universal-robots.com/t/read-variables-set-by-assignment/1603), I’m continuing having the _NoClassDefFoundError_ when using for example _VariableModel_ and the _Filter_ running on the simulator (3.5.3 - API 1.2.56).  
I’m correctly importing the classes in the source file (_import com.ur.urcap.api.domain.variable.Variable;_, _import com.ur.urcap.api.domain.variable.VariableModel;_ and _import com.ur.urcap.api.domain.util.Filter;_) and building with the correct SDK.

What I’m missing?

Best regards,

Matteo Timossi @anon46802796

---

<div class="post-metadata">

**Author:** ![anon46802796](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@anon46802796](https://forum.universal-robots.com/u/anon46802796)\
**Post date:** [April 13, 2018, 2:43pm UTC](https://forum.universal-robots.com/t/noclassdeffounderror-for-some-sdk-1-2-classes/1855/2 "2018-04-13T14:43:27Z")

</div>

For others reading, I found the issue…I was missing some packages from the MANIFEST file.