# ValueError: DigMontage **URL:** \ **Category:** Support & Discussions\ **Tags:** eeg, visualization\ **Created:** [October 23, 2023, 3:52pm UTC](https://mne.discourse.group/t/valueerror-digmontage/7720 "2023-10-23T15:52:14Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![NicolePurkinje](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/nicolepurkinje/32/3120_2.png) [@NicolePurkinje](https://mne.discourse.group/u/NicolePurkinje)\ **Post date:** [October 23, 2023, 3:52pm UTC](https://mne.discourse.group/t/valueerror-digmontage/7720/1 "2023-10-23T15:52:14Z")
Hello! i have problems with setting electrode locations. My code is: montage = ‘standard\_1020’ raw.set\_montage(montage) and the error is: ValueError: DigMontage is only a subset of info. There are 16 channel positions not present in the DigMontage. The channels missing from the montage are: [‘L\_Mast-0’, ‘R\_Mast-0’, ‘L\_Sup-0’, ‘R\_Sup-0’, ‘L\_Lat-0’, ‘R\_Lat-0’, ‘L\_Inf-0’, ‘R\_Inf-0’, ‘L\_Mast-1’, ‘R\_Mast-1’, ‘L\_Sup-1’, ‘R\_Sup-1’, ‘L\_Lat-1’, ‘R\_Lat-1’, ‘L\_Inf-1’, ‘R\_Inf-1’]. Consider using inst.rename\_channels to match the montage nomenclature, or inst.set\_channel\_types if these are not EEG channels, or use the on\_missing parameter if the channel positions are allowed to be unknown in your analyses. I dont know what is this, help please! Thanks ---
**Author:** ![richard](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/richard/32/15_2.png) [@richard](https://mne.discourse.group/u/richard)\ **Post date:** [October 23, 2023, 6:32pm UTC](https://mne.discourse.group/t/valueerror-digmontage/7720/2 "2023-10-23T18:32:58Z")
Hello, those channel names are not part of the 10-20 system and hence you cannot use them with the 10-20 template montage in MNE (unless you rename the channels). If you have a montage file supplied by the cap manufacturer, or digitized sensor locations, you can use those with MNE … Richard