# morph to fsaverage volume source after apply\_lcmv
**URL:** https://mne.discourse.group/t/morph-to-fsaverage-volume-source-after-apply-lcmv/6110
**Category:** Support & Discussions
**Tags:** source-localization, beamformer
**Created:** [December 26, 2022, 4:22pm UTC](https://mne.discourse.group/t/morph-to-fsaverage-volume-source-after-apply-lcmv/6110 "2022-12-26T16:22:14Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Sherry](https://mne.discourse.group/u/Sherry)
#### Post date: [December 26, 2022, 4:22pm UTC](https://mne.discourse.group/t/morph-to-fsaverage-volume-source-after-apply-lcmv/6110/1 "2022-12-26T16:22:14Z")
Dear MNE users,
I am creating volume source space of whole brain and then obtain stc using apply\_lcmv, and then morphing to fsaverage. But an error about src arised.
Following is the snippet,
> fs\_dir = fetch\_fsaverage(verbose=True)
> subjects\_dir = op.dirname(fs\_dir)
> subject = ‘fsaverage’
> src = op.join(fs\_dir, ‘bem’, ‘fsaverage-vol-5-src.fif’)
> src\_volume = mne.read\_source\_spaces(src)
> fname\_fwd = op.join(fpath, subject + “-volume\_fwd.fif”)
> fwd = mne.read\_forward\_solution(fname\_fwd)
> fname\_src = op.join(fpath, subject + “-volume\_src.fif”)
> src = mne.read\_source\_spaces(fname\_src)
> data\_cov = mne.compute\_covariance(epochs\_rs, tmin=0.01, tmax=0.60, method=‘empirical’)
> noise\_cov = mne.compute\_covariance(epochs\_rs, tmin=-0.5, tmax=-0.1, method=‘empirical’)
> filters = make\_lcmv(evoked.info, fwd, data\_cov, reg=0.05, noise\_cov=noise\_cov, pick\_ori=‘max-power’, weight\_norm=‘unit-noise-gain’, rank=None)
> stc\_LCMV = apply\_lcmv(evoked, filters)
> morph = mne.compute\_source\_morph(src=fwd[‘src’], subjects\_dir=subjects\_dir, niter\_affine = [10, 10, 5], niter\_sdr = [10, 10, 5], src\_to=src\_volume, verbose=True)
> stc\_LCMV\_fs = morph.apply(stc\_LCMV)
_**whenever I am trying to apply the morphing [for example: morph = mne.compute\_source\_morph(src=fwd[‘src’], …) or src=src], the code lands up with an error:**_
> RuntimeError: MRI interpolator not present in src[0], cannot use mri\_resolution=True
What could be the possible solution? I don’t know why src or fwd[‘src’] not working for mne.compute\_source\_morpy.
Best,
Sherry
- MNE version: 1.0.3
- operating system: Centos Linux 7
---
### Author:  [@Sherry](https://mne.discourse.group/u/Sherry)
#### Post date: [January 4, 2023, 2:21pm UTC](https://mne.discourse.group/t/morph-to-fsaverage-volume-source-after-apply-lcmv/6110/2 "2023-01-04T14:21:54Z")
Dear MNE users,
Unfortunately, I haven’t solved this error yet. Therefore, I want to clarify the question and to see if anyone has any idea about it.
The error is:
> RuntimeError: MRI interpolator not present in src[0], cannot use mri\_resolution=True
when I run:
> morph = mne.compute\_source\_morph(src=fwd[‘src’], subjects\_dir=subjects\_dir, niter\_affine = [10, 10, 5], niter\_sdr = [10, 10, 5], src\_to=src\_volume, verbose=True)
fwd is loaded by:
> fname\_fwd = op.join(fpath, subject + “-volume\_fwd.fif”)
> fwd = mne.read\_forward\_solution(fname\_fwd)
Best,
Sherry