# Rad optional Parameters in HB\[+\]

**URL:** <https://discourse.ladybug.tools/t/rad-optional-parameters-in-hb/2043>\
**Category:** honeybee\[+\]\
**Tags:** radiance-parameters\
**Created:** [September 8, 2017, 9:15am UTC](https://discourse.ladybug.tools/t/rad-optional-parameters-in-hb/2043 "2017-09-08T09:15:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![PeterZatko](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/peterzatko/32/19_2.png) [@PeterZatko](https://discourse.ladybug.tools/u/PeterZatko)\
**Post date:** [September 8, 2017, 9:15am UTC](https://discourse.ladybug.tools/t/rad-optional-parameters-in-hb/2043/1 "2017-09-08T09:15:00Z")

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Hi there,

I think my problem is self-explanatory, see pic below.

thank you for any feedback

Peter

[![](https://discourse.ladybug.tools/uploads/default/original/2X/9/9d18e4b7436a12bac2235ac2383a9b0f3cccbf09.PNG)](http://api.ning.com:80/files/xstith8gZ-D-cnm7zosNVu6oFrMgyL2N1jbAo62fMXHm0hZWDkdbtYZ0hqT7PFkYMCQaDYyafrZQBBelWyohb69RtTpv3go*/HB_Additional_RAD.PNG)

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**Author:** ![mostapha](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/mostapha/32/15244_2.png) [@mostapha](https://discourse.ladybug.tools/u/mostapha)\
**Post date:** [September 8, 2017, 9:23am UTC](https://discourse.ladybug.tools/t/rad-optional-parameters-in-hb/2043/2 "2017-09-08T09:23:00Z")

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Hi Peter,

dmtxOptPar has its own input. You’re changing the radOptPar which will be used for Rtrace. If you want to change the parameters for daylight matrix (rfluxmtx) then you need to use dmtxOptPar input.

PS: I will answer to your other question with an example code soon. The short answer is that the error happens because Annual Recipe by design cannot to handle window groups. That’s why it only inputs the first group of results.

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**Author:** ![PeterZatko](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/peterzatko/32/19_2.png) [@PeterZatko](https://discourse.ladybug.tools/u/PeterZatko)\
**Post date:** [September 8, 2017, 9:46am UTC](https://discourse.ladybug.tools/t/rad-optional-parameters-in-hb/2043/3 "2017-09-08T09:46:00Z")

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Hi Mostapha,

Got it, sorry for my stupidity.

Best

Peter