MPP import builds no assignment baselines (dates, work, cost, BCWS/BCWP) #445

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1. yeroo

   added

   follow-up-nestedfiled automatically by an agworkbench loopfiled automatically by an agworkbench loop

   priority:P0critical: blocks spec work, loses data, or breaks the user's flowcritical: blocks spec work, loses data, or breaks the user's flow

   on Sep 28, 2026
2. yeroo commented on Sep 28, 2026

   

   yeroo

   on Sep 28, 2026

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   Triaged priority:P0 (blocks current work).
3. yeroo

   added 3 commits that reference this issue on Sep 28, 2026

   Fix r5: refuse assignments on blank rows; scope the MPXJ calendar-bit…

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   7c92974

   Use as_chunks for resource name units (#445 ci)

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   69f5035

   Allow too_many_arguments on the oracle task-field checker (#445 ci)

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   8dea632
4. yeroo

   closed this as completedin #507on Sep 28, 2026
5. yeroo

   added a commit that references this issue on Sep 28, 2026

   Merge pull request #507 from yeroo/issue-445-mpp-import-builds-no-ass…

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   fa53f74
6. yeroo commented on Sep 28, 2026

   

   yeroo

   on Sep 28, 2026

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   The merged fix (#507, fa53f74) fails on the real .mpp corpus. CI cannot see this: the corpus is private and not fetched in CI, so these tests only run where corpus/tools/fetch-mpp-corpus.* has been run.

   On Windows, main 3834fb4, corpus yeroo/mpp-corpus b02a8e0:

   cargo test --release -p mppread --test oracle_corpus
   test assignment_oracles ... ok
   test project_2024_oracles ... FAILED
   panicked at mppread\tests\oracle_corpus.rs:486:29:
   ...\corpus/mpp/snapshots\44-baseline.mpp: decoded import: cannot read the assignments of this .mpp (invalid baseline work for assignment UID 17)
   

   The error comes from mppread/src/assndecode.rs:106 ("invalid baseline {what} length …"), so project_from_mpp now refuses the whole file rather than importing it without that baseline. project_2024_oracles stops at this first failure, so later snapshots are not reached.

   Separately, on a Mac with the same corpus, the same test file reported a resource count of 0 for 31-calendar-hours.mpp where the XML oracle has 1 (other 82 checks passing). Not reproduced here yet because of the failure above.
7. yeroo commented on Sep 28, 2026

   

   yeroo

   on Sep 28, 2026

   Last edited by yeroo

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   Correction to my comment above: the 31-calendar-hours.mpp failure is not in oracle_corpus.rs and is not hidden behind the 44-baseline failure. It is the library unit test overalloc::tests::project_assignment_and_resource_offsets (mppread/src/overalloc.rs:415), and it reproduces on Windows as well as macOS with cargo test --release -p mppread --lib. Running cargo test -p mppread --release --no-fail-fast -- --include-ignored shows three failures with two causes; they are now tracked separately: #517 (44-baseline, from #507) and #518 (31-calendar-hours).