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When mapjoining coverages of adjacent geographic areas, MAPJOIN bails out and returns the following error message:
Partial process enabled. 61% of the coverage will be processed.
Mismatch of border segments (NODPOL)
Bailing out of BUILD"
This message may also be encountered when running CLEAN or BUILD.
The error message may occur for one of the following reasons:
1. Occasionally, an MSK file is present in one or both of the original coverages. The MSK file is a bitmap file containing the map extent of a previous editing session in ARCEDIT. It is used by BUILD and CLEAN to process only those portions of the coverage that were last updated. The MSK file is deleted after the coverage topology has been updated. Deleting the MSK file(s) and/or rebuilding topology for the original coverage(s) usually resolves the situation.
A new MSK file is created during the MAPJOIN process to enable partial processing of the border areas of the maps. The new MSK file is not related to pre-existing MSK files in the input coverages.
Sometimes this can be resolved by joining the coverages in parts. For example, if there are 12 coverages to join, first try joining 6 coverages together. If the MAPJOIN still fails, try joining only 2 coverages together. This approach allows one or two coverages to be singled out, which may be causing the entire process to fail. Once the coverages have been fixed, they should be able to be joined to the rest of the coverages.