topic Re: Load a light (.lgh) file in Creo Parametric in 3D Part & Assembly Design

Load a light (.lgh) file in Creo Parametric

tbraxton — Tue, 21 Oct 2025 15:56:26 GMT

According to the PTC documentation, this is supported. I am not able to get this to work in Creo 7, 9 , or 10.

Is anyone able to confirm that loading a light file works for them? It is possible my light files are corrupted in some way, if someone has a sample light file they can post here, I will try it. I have included one of my .lgh files for reference.

Re: Load a light (.lgh) file in Creo Parametric

MartinHanak — Wed, 22 Oct 2025 06:10:36 GMT

Hi,

just comment ... your file contains following line. I guess such file is not compatible with Creo 7, 9 , or 10.

I saved lights in Creo 10.0.6.0 and attached it to this reply ... lights_Creo10.dlg.

Re: Load a light (.lgh) file in Creo Parametric

remy — Wed, 22 Oct 2025 08:53:34 GMT

Like @MartinHanak hinted, the file is old and dated from Pro/ENGINEER 17.
I gathered an internal information that the support of lgh file has been discontinued in 2015.

Regression tests reveal that support is active up to Creo 3.0.

Starting with Creo 4.0 only .dlg files are supported :

Re: Load a light (.lgh) file in Creo Parametric

tbraxton — Wed, 22 Oct 2025 15:07:27 GMT

@remy Thanks for checking internally on this.

This is a link to the Creo 12 documentation, it clearly states that .lgh files can be loaded. Based on your findings this documentation is not accurate and has not been since Creo 4.

To Open a Light File

This should be corrected by the documentation team. Internally how are documentation errors reported and addressed? Is there a way to open a case for documentation problems?

If I were to send you some light files are you able to open them in Creo 3 and save them as .dlg files and send them back to me?

Re: Load a light (.lgh) file in Creo Parametric

tbraxton — Thu, 23 Oct 2025 16:33:58 GMT

@MartinHanak Thank you for posting the .dlg file. I was able to load this file in Creo 10. So the .dlg format is valid but the .lgh is no longer supported. I will be opening a case with PTC to get the documentation updated.

Re: Load a light (.lgh) file in Creo Parametric

remy — Mon, 27 Oct 2025 11:53:53 GMT

hi @tbraxton

Opened case on your behalf.