Notice
The error messages listed in this appendix have been taken from Naval Ocean Systems Center Technical Document 116 (TD 116), volume 2, Numerical Electromagnetic Code (NEC) — Method of Moments, Part III: User's Guide, revised 2 January 1980.
1. CHECK DATA, PARAMETER SPECIFYING SEGMENT POSITION IN A GROUP OF EQUAL TAGS CANNOT BE ZERO.
This error results from an input data error and may occur at any point where a tag number is used to identify a segment. Execution terminated.
Data on the NT, TL, EX, and PT commands should be checked.
2. CONNECT — SEGMENT CONNECTION ERROR FOR SEGMENT _.
Possible causes: number of segments at a junction exceeds limit; segment lengths are zero; array overflow.
3. DATA FAULT ON LOADING COMMAND NO. =_ ITAG STEP1 =_ IS GREATER THAN ITAG STEP2 =_
When several segments are loaded, the number of the second segment specified must be greater than the number of the first segment.
Execution terminated.
4. EOF ON UNIT_NBLKS =_NEOF =_.
An end of file has been encountered while reading data from the unit. NBLKS determines how many records are read from the unit. NEOF is a flag to indicate which call to BLCKIN-initiated thread. If NEOF = 777, this diagnostic is normal and execution will continue. Otherwise, an error is indicated and execution will terminate.
5. ERROR — ARC ANGLE EXCEEDS 360 DEGREES
Error on GA command.
6. ERROR — B LESS THAN A IN ROM2.
Program malfunction.
7. ERROR — FR/GN COMMAND IS NOT ALLOWED WITH NGF.
8. ERROR — CORNERS OF QUADRILATERAL PATCH DO NOT LIE IN A PLANE.
The four corners of a quadrilateral patch (SP command) must lie in a plane.
9. ERROR — COUPLING IS NOT BETWEEN 0 AND 1, Inaccuracy in solution or error in data.
10. ERROR — GF MUST BE FIRST GEOMETRY DATA COMMAND.
11. ERROR IN GROUND PARAMETERS — COMPLEX DIELECTRIC CONSTANT FROM FILE IS REQUESTED.
Complex dielectric constant from SOMNEC file does not agree with data from GN and FR commands.
12. ERROR — INSUFFICIENT STORAGE FOR INTERACTION MATRICES.IRESRV, IMAT NEQ. NEQ2 = Array storage exceeded in NGF solution.
13. ERROR — INSUFFICIENT STORAGE FOR MATRIX.
Array storage for matrix is not sufficient for out-of-core solution.
14. ERROR — NETWORK ARRAY DIMENSIONS TOO SMALL.
The number of different segments to which transmission lines or network ports are connected exceeds array dimensions. Execution terminated.
15. ERROR — LOADING MAY NOT BE ADDED TO SEGMENTS IN NGF SECTION.
16. ERROR — NGF IN USE. CANNOT WRITE NEW NGF
17. ERROR — THE NUMBER OF NEW SEGMENTS CONNECTED TO NGF SEGMENTS OR PATCHES EXCEEDS LIMIT.
18. FAULTY DATA COMMAND LABEL AFTER GEOMETRY SECTION.
A command with an unrecognizable mnemonic has been encountered in the program control commands following the geometry commands.
Execution terminated.
19. GEOMETRY DATA COMMAND ERROR.
A geometry data command was expected, but the command mnemonic is not that of a geometry command.
Execution terminated.
After the GE command in a data file, the possible geometry mnemonics are GE, GM, GR, GS, G W, GX, SP, and SS. The GE command must be used to terminate the geometry commands.
20. GEOMETRY DATA ERROR — PATCH _ LIES IN PLANE OF SYMMETRY.
21. GEOMETRY DATA ERROR — SEGMENT _ EXTENDS BELOW GROUND.
When ground is specified on the GE command, no segment may extend below the XY plane.
Execution terminated.
22. GEOMETRY DATA ERROR — SEGMENT _ LIES IN GROUND PLANE.
When ground is specified on the GE command, no segment should lie in the XY plane.
Execution terminated.
23. GEOMETRY DATA ERROR — SEGMENT _ LIES IN PLANE OF SYMMETRY.
A segment may not lie in or cross a plane of symmetry about which the structure is reflected since the segment and its image will coincide or cross.
Execution terminated.
24. IMPROPER LOAD TYPE CHOSEN. REQUESTED TYPE IS _.
Valid load types (LDTYP on the LD command) are from 0 through 5.
Execution terminated.
25. INCORRECT LABEL FOR A COMMENT COMMAND.
The program expected a comment command, with mnemonic CM or CE, but encountered a different mnemonic.
Execution terminated.
Comment commands must be the first commands in a data set, and the comments must be terminated by the CE mnemonic.
26. LOADING DATA COMMAND ERROR, NO SEGMENT HAS AN ITAG =_.
ITAG specified on an LD command could not be found as a segment tag.
Execution terminated.
27. NO SEGMENT HAS AN ITAG OF_.
This error results from faulty input data and can occur at any point where a tag number is used to identify a segment.
Execution terminated.
Tag numbers on the NT, TL, EX, CP, PQ, and PT commands should be checked.
28. NOTE, SOME OF THE ABOVE SEGMENTS HAVE BEEN LOADED TWICE, thus the IMPEDANCES WERE ADDED.
A segment or segments have been loaded by two or more LD commands. The impedances of the loads have been added in series. This is only an informative message.
Execution continues.
29. NUMBER OF EXCITATION COMMANDS EXCEEDS STORAGE ALLOTTED.
The number of voltage source excitations exceeds array dimensions.
The dimensions in the original NEC-2 file allow 10 voltage sources. Refer to Array Dimension Limitations to change the dimensions.
30. NUMBER OF LOADING COMMANDS EXCEEDS STORAGE ALLOTTED.
The number of LD commands exceeds array dimension.
Execution terminated.
The dimension in the original NEC-2 file allows 30 LD commands.
31. NUMBER OF NETWORK COMMANDS EXCEEDS STORAGE ALLOTTED.
The number of NT and TL commands exceeds array dimension.
Execution terminated.
The dimension in the original NEC-2 file allows 30 commands.
32. NUMBER OF SEGMENTS IN COUPLING CALCULATION (CP) EXCEEDS LIMIT.
Array dimension limit.
33. NUMBER OF SEGMENTS AND SURFACE PATCHES EXCEEDS DIMENSION LIMIT.
The sum of the number of segments and patches is limited by dimensions. The present limit is 300.
34. PATCH DATA ERROR.
Invalid data on SP, SM, or SC command; or SC command not found where required.
35. PIVOT (_) =_.
This will be printed during the Gauss Doolittle factoring of the interaction matrix or the network matrix when a pivot element less than 10E−10 is encountered, and it indicates that the matrix is nearly singular. The number in parentheses shows on which pass through the matrix the condition occurred. This is usually an abnormal condition, although execution will continue. It may result from coinciding segments or a segment of zero length.
36. RADIAL WIRE G.S. APPROXIMATION MAY NOT BE USED WITH SOMMERFELD GROUND OPTION.
37. RECEIVING PATTERN STORAGE TOO SMALL, ARRAY TRUNCATED.
Routine: MAIN.
The number of points requested in a receiving pattern exceeds array dimension. Execution will continue, but storage of normalized pattern will be truncated. This array dimension is 200 in the original NEC-2 file.
38. ROM2 — STEP SIZE LIMITED AT Z =.
Probably caused by a wire too close to the ground in the Sommerfeld/Norton ground method. Execution continues but results may be inaccurate.
39. SBF — SEGMENT CONNECTION ERROR FOR SEGMENT_.
The number of segments at a junction exceeds dimension limit (30), or the connection numbers are not self-consistent.
40. SEGMENT DATA ERROR.
A segment with zero length or zero radius was found.
Execution terminated.
41. STEP SIZE LIMITED AT Z =_.
The numerical integration to compute interaction matrix elements, using the Romberg variable interval width method, was limited by the minimum allowed step size. Execution will continue. An inaccuracy may occur but is usually not serious. May result from a thin wire or a wire close to the ground.
42. STORAGE FOR IMPEDANCE NORMALIZATION TOO SMALL, ARRAY TRUNCATED.
The number of frequencies on FR command exceeds the array dimension for impedance normalization. An impedance beyond the limit will not be normalized. Execution continues. The limit is 50 in the original NEC file.
Array overflow or program malfunction.
44. TBF — SEGMENT CONNECTION ERROR FOR SEGMENT _. Same as error 39.
45. TRIO — SEGMENT CONNECTION ERROR FOR SEGMENT _. Same as error 39.
46. WHEN MULTIPLE FREQUENCIES ARE REQUESTED, ONLY ONE NEAR-FIELD COMMAND CAN BE USED. LAST COMMAND READ IS USED.
Execution continues.