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When running the attached Cyclotron simulation with 8 cores we get after 13 turns the following error:

Error{0}> All Fields in an expression must be aligned. (Do you have enough guard cells?) Error{0}> This error occurred while evaluating an expression for an LField with domain {[0:6:1],[0:6:1],[0:7:1]} Warning{0}> CommMPI: Found extra message from node 1, tag 20996: msg = Message contains 6 items (0 removed). Contents: Warning{0}> Item 0: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 1: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 2: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 3: 1 elements, 4 bytes total, needDelete = 0 Warning{0}> Item 4: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 5: 49 elements, 1176 bytes total, needDelete = 0 Warning{0}> Warning{0}> CommMPI: Found extra message from node 2, tag 20996: msg = Message contains 6 items (0 removed). Contents: Warning{0}> Item 0: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 1: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 2: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 3: 1 elements, 4 bytes total, needDelete = 0 Warning{0}> Item 4: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 5: 56 elements, 1344 bytes total, needDelete = 0 Warning{0}> Warning{0}> CommMPI: Found extra message from node 3, tag 20996: msg = Message contains 6 items (0 removed). Contents: Warning{0}> Item 0: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 1: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 2: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 3: 1 elements, 4 bytes total, needDelete = 0 Warning{0}> Item 4: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 5: 7 elements, 168 bytes total, needDelete = 0 Warning{0}> Warning{0}> CommMPI: Found extra message from node 4, tag 20996: msg = Message contains 6 items (0 removed). Contents: Warning{0}> Item 0: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 1: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 2: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 3: 1 elements, 4 bytes total, needDelete = 0 Warning{0}> Item 4: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 5: 56 elements, 1344 bytes total, needDelete = 0 Warning{0}> Warning{0}> CommMPI: Found extra message from node 5, tag 20996: msg = Message contains 6 items (0 removed). Contents: Warning{0}> Item 0: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 1: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 2: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 3: 1 elements, 4 bytes total, needDelete = 0 Warning{0}> Item 4: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 5: 7 elements, 168 bytes total, needDelete = 0 Warning{0}> Warning{0}> CommMPI: Found extra message from node 6, tag 20996: msg = Message contains 6 items (0 removed). Contents: Warning{0}> Item 0: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 1: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 2: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 3: 1 elements, 4 bytes total, needDelete = 0 Warning{0}> Item 4: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 5: 8 elements, 192 bytes total, needDelete = 0 Warning{0}> Warning{0}> CommMPI: Found extra message from node 7, tag 20996: msg = Message contains 6 items (0 removed). Contents: Warning{0}> Item 0: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 1: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 2: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 3: 1 elements, 4 bytes total, needDelete = 0 Warning{0}> Item 4: 3 elements, 12 bytes total, needDelete = 0 Warning{0}> Item 5: 1 elements, 24 bytes total, needDelete = 0 Warning{0}>

Notes:

1. with a restart the error disappears
2. same errors are also visible with OPAL-t
3. related issues #172 (closed) and #226 (closed)

guard-cell-error.tgz