What causes "failed to process map batches: %v" in plandex-ai/plandex?

Inspect the wrapped %v for the true root cause (API error vs read error vs budget).

failed to process map batches: %v

Error message

failed to process map batches: %v

What it means

Top-level wrapper for failures in processMapBatches, which assembles the updated repo-map bodies from the computed input batches. If any batch computation fails (which may itself include upstream API/tokenization errors), the whole map update for that context is aborted with this message.

Source

Thrown at app/cli/lib/context_update.go:832

						errs = append(errs, err)
						return
					}
				}

				hasAnyUpdate := len(state.removedMapPaths) > 0 || len(state.mapInputShas) > 0

				if hasAnyUpdate {
					mu.Lock()
					defer mu.Unlock()

					updatedContexts = append(updatedContexts, ctx)

					numMaps++

					reqFns[ctx.Id] = func() (*shared.UpdateContextParams, error) {
						updatedMapBodies, err := processMapBatches(state.mapInputBatches)
						if err != nil {
							return nil, fmt.Errorf("failed to process map batches: %v", err)
						}

						return &shared.UpdateContextParams{
							MapBodies:       updatedMapBodies,
							InputShas:       state.mapInputShas,
							InputTokens:     state.mapInputTokens,
							InputSizes:      state.mapInputSizes,
							RemovedMapPaths: state.removedMapPaths,
						}, nil
					}
				}

			}(context)

		case shared.ContextURLType:
			wg.Add(1)
			go func(ctx *shared.Context) {
				defer wg.Done()

View on GitHub (pinned to e2d772072e)

Solutions

Inspect the wrapped %v for the true root cause (API error vs read error vs budget).
Reduce the map size (exclude directories via ignore rules) if a token-budget error is reported.
Retry after transient network/provider failures.
Rebuild the map context if its batches are stale or corrupted.

Defensive patterns

Strategy: fallback

Validate before calling

// estimate map size before refresh
if totalMapTokens > maxModelTokens {
    return fmt.Errorf("map too large (%d tokens); exclude dirs via ignore rules", totalMapTokens)
}

Try / catch

updated, err := refreshMapContext(ctx)
if err != nil {
    log.Printf("map refresh failed, keeping previous map: %v", err)
    updated = previousMap
}

Prevention

Trim map size with ignore rules before large refreshes
Retry after transient provider/network errors
Rebuild map contexts that fail repeatedly
Monitor the wrapped root cause, not the wrapper

When it happens

Trigger: The reqFns entry for a map context calls processMapBatches(state.mapInputBatches) and receives a non-nil error — any underlying batch failure (content read, token budget exceeded, upstream provider error) is propagated here.

Common situations: Map too large for the model's token budget after many files changed at once; underlying provider/API call inside batch processing failed; empty or corrupted batch input after partial phase failures upstream.

Related errors

AI-assisted analysis of plandex-ai/plandex@e2d772072e (2026-09-05). Data as JSON: /api/errors/b0c9f92eca826bf3. Report an issue: GitHub.