Skip to content

DM-51632: LSSTCam DRP error in subtractImages: "Unable to determine kernel sum; 0 candidates" #417

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
BrunoSanchez merged 1 commit into from
Jul 24, 2025
Merged

DM-51632: LSSTCam DRP error in subtractImages: "Unable to determine kernel sum; 0 candidates" #417

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 14 additions & 1 deletion python/lsst/ip/diffim/psfMatch.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -858,7 +858,20 @@ def _solve(self, kernelCellSet, basisList):
ksv.resetKernelSum()
ksv.setMode(diffimLib.KernelSumVisitorF.AGGREGATE)
kernelCellSet.visitCandidates(ksv, nStarPerCell, ignoreExceptions=True)
ksv.processKsumDistribution()

allCellsEmpty = True
for cell in kernelCellSet.getCellList():
if not cell.empty():
allCellsEmpty = False
break
if allCellsEmpty:
raise NoKernelCandidatesError("All spatial cells are emtpy of candidates")

try:
ksv.processKsumDistribution()
except RuntimeError as e:
raise NoKernelCandidatesError("Unable to calculate the kernel sum") from e

ksv.setMode(diffimLib.KernelSumVisitorF.REJECT)
kernelCellSet.visitCandidates(ksv, nStarPerCell, ignoreExceptions=True)

Expand Down