# QT GUI Time Sink Attribute Error

**URL:** <https://www.ruby-forum.com/t/qt-gui-time-sink-attribute-error/238850>\
**Category:** GNU Radio\
**Created:** [January 31, 2014, 4:09am UTC](https://www.ruby-forum.com/t/qt-gui-time-sink-attribute-error/238850 "2014-01-31T04:09:32Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [January 31, 2014, 4:09am UTC](https://www.ruby-forum.com/t/qt-gui-time-sink-attribute-error/238850/1 "2014-01-31T04:09:32Z")

</div>

Dear Sir,

How to use the block of QT GUI Time Sink?  
It always produces following error message:

Generating: “/home/sgku/grc/top\_block.py”  
Executing: “/home/sgku/grc/top\_block.py”  
Traceback (most recent call last):  
File “/home/sgku/grc/top\_block.py”, line 158, in   
tb = top\_block()  
File “/home/sgku/grc/top\_block.py”, line 93, in **init**  
self.top\_layout.addWidget(self.\_qtgui\_time\_sink\_x\_0\_win)  
File  
“/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top\_block.py”,  
line 94, in **getattr**  
return getattr(self.\_tb, name)  
AttributeError: ‘gr\_top\_block\_sptr’ object has no attribute ‘top\_layout’

> > > Done

Please advise, thanks.  
Regards,  
activecat

---

<div class="post-metadata">

**Author:** ![activecat\_k](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c57346/32.png) [@activecat\_k](https://www.ruby-forum.com/u/activecat_k)\
**Post date:** [January 31, 2014, 5:04am UTC](https://www.ruby-forum.com/t/qt-gui-time-sink-attribute-error/238850/2 "2014-01-31T05:04:26Z")

</div>

Upper left corner of your GRC flowgraph. Where it says Generate Options.  
Change that to “QT GUI”.

–n

---

<div class="post-metadata">

**Author:** ![activecat\_k](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c57346/32.png) [@activecat\_k](https://www.ruby-forum.com/u/activecat_k)\
**Post date:** [January 31, 2014, 6:20am UTC](https://www.ruby-forum.com/t/qt-gui-time-sink-attribute-error/238850/3 "2014-01-31T06:20:21Z")

</div>

Dear Nick,

I see, it is a value for “Generate Options” within the “Options” block.  
I get it, thanks.

Regards,  
activecat