jevillegasd
commented
2 years ago Hey @mroddewig !
I hope this is still useful after many days. It looks to me that your waveguides are no longer associated with the SiEPIC parametric cell. I can tell by their names (with all the '$' symbols on them). It may have happened that you copied and pasted the layout from one file to another that didn't have the correct technology selected, or that you opened the file in a KLayout version without SiEPIC tools installed.
You can see an example in the files I am attaching, both have the same cell, but in one it is still the SiEPIC parametric waveguide cell, while in the other it's just a static copy of it. An easy way to test if your waveguides are correctly instantiated by selecting them and pressing 'Q', this will open the properties window; if the 'PCell Parameters' tab is disabled, your object is static (and you cannot measure its length).
The best solution in your case is to draw the waveguides again. Here is an example of the current release of SiEPIC working fine :) (with the attached file) :
Super Secret: Even if the waveguide is now static, normally upon creation the length gets written down as a small text close to the first PIN of the waveguide, so you can zoom in that area and you might find the value there.
mroddewig
lukasc-ubc
With the klayout file for Lukas Chrostowski's edx course final exam (not sure I can post) I'm unable to measure the waveguide length. I select a waveguide, click the waveguide length menu item, and then get a dialog box telling me to select a waveguide to measure. A video of the problem is here: https://montanaedu-my.sharepoint.com/:v:/g/personal/j39g462_msu_montana_edu/ESXrovVGpZJPtM--r6ULgyQBAsJ3cZ_ogpAtdMeH-ZJ57g?e=5Eqpng
I'm using the SiEPIC tools version 0.39.1 and klayout 0.27.10. Thanks!