# Error when opening HB LB file

**URL:** <https://discourse.ladybug.tools/t/error-when-opening-hb-lb-file/414>\
**Category:** old forum\
**Created:** [March 31, 2015, 10:46pm UTC](https://discourse.ladybug.tools/t/error-when-opening-hb-lb-file/414 "2015-03-31T22:46:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![DanielMak](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/danielmak/32/421_2.png) [@DanielMak](https://discourse.ladybug.tools/u/DanielMak)\
**Post date:** [March 31, 2015, 10:46pm UTC](https://discourse.ladybug.tools/t/error-when-opening-hb-lb-file/414/1 "2015-03-31T22:46:00Z")

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Dear all,

For some reason whenever Iopen a HB file an error sign **“You should first let Honeybee to fly”** always appears on the “ **Honeybee\_ListZonePrograms** ” and “ **Honeybee\_Call from EP Construction Library** ” tabs although the HB and LB tabs have always been on the canvas. (Attached are the screen shots)

Whenever I reconnect the tabs they run ok but I am sure this is not what should normally happen.

Does anyone know how I can fix this problem?

Thanks in advance,

Daniel

![](https://discourse.ladybug.tools/uploads/default/original/2X/9/935f8a35e7f511b4fa9ec216603f219dfbc52aeb.png)  
  
 ![](https://discourse.ladybug.tools/uploads/default/original/2X/f/f3489fef4a2315bdc0d2fea4530d0e1694cbe51a.png)

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**Author:** ![AbrahamYezioro](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/abrahamyezioro/32/3_2.png) [@AbrahamYezioro](https://discourse.ladybug.tools/u/AbrahamYezioro)\
**Post date:** [March 31, 2015, 11:35pm UTC](https://discourse.ladybug.tools/t/error-when-opening-hb-lb-file/414/2 "2015-03-31T23:35:00Z")

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You should send the LB\_LB and HB\_HB components to the back, so they are executed first when the file opens (Ctrl+B). That should work.

Also you can Disable/Enable the previous ones and then disable/enable the faulty components (Ctrl+E).

No need to reconnect.

-A.