0;no error
36;error opening terrain- or morphological data file (data not available)
200;error in longitude (in 'Point_heighe or 'Point_type' subroutine)
210;error in latitude (in 'Point height' or 'Point_type' subroutine)
220;error reading record (in 'Point_heighf or 'Point_type' subroutine)
300;latitude is not in range of 0.0 - 90.0 (in 'Point_height' or 'Point_type' ! subroutine)
400;height is missing (-9999) (in 'Point height' subroutine)
1000;Distance between Tx and Rx = 0. Calculations not possible
1001;Error in geographical coordinates (Tx longitude, degrees)
1002;Ener in geographical coordinates (Tx longitude, minutes)
1003;Error in geographical coordinates (Tx longitude, seconds)
1004;Error in geographical coordinates (Tx longitude, E/W)
1005;Error in geographical coordinates (Tx latitude, degrees)
1006;Error in geographical coordinates (Tx latitude, minutes)
1007;Error in geographical coordinates (Tx latitude, seconds)
1008;Error in geographical coordinates (Tx latitude, N/S)
1009;Error in Tx antenna height
1010;Error in transmitting frequency value
1011;Error in transmitting frequency unit
1012;Error in radius of service area of Tx
1013;Error in input value height of Tx site above sea level
1014;Error in geographical coordinates (Rx longitude, degrees)
1015;Error in geographical coordinates (Rx longitude, minutes)
1016;Error in geographical coordinates (Rx longitude, seconds)
1017;Error in geographical coordinates (Rx longitude, E/W)
1018;Error in geographical coordinates (Rx latitude, degrees)
1019;Error in geographical coordinates (Rx latitude, minutes)
1020;Error in geographical coordinates (Rx latitude, seconds)
1021;Error in geographical coordinates (Rx latitude, N/S)
1022;Error in Rx antenna height
1023;Error in reception frequency value
1024;Error in reception frequency unit
1025;C_mode is out of range
1026;Error in input value of permissible field strength
1027;Error in input value of maximum cross border range
1028;The distance is greater than 1000 km. Calculations not possible
1029;Error in radius of Rx service area
1030;Error in input value Rx site height above sea level
1031;Error in Tx elevation
1032;Error in Tx azimuth
1033;Error in typ of Tx antenna (Eil)
1034;Error in power
1035;Error in input value of distance over sea
1036;The 'xxx.ALL' borderline file for Tx is missing
1037;The 'xxx.ALL' borderline file for Rx is missing
1038;Error in type of antenna (TR20-08)
1039;Error in input data of correction factor according frequency difference
1040;Channel spacing outside definition range (Rx)
1041;Channel spacing outside definition range (Tx)
1042;Error in Rx elevation
1043;Error in Rx azimuth
1044;Error in Rx type of antenna ("E" or "I")
1045;Error in gain of Rx antenna
1046;Error in input data of depolarization loss
1047;Distance to borderline is too long
1048;Selected line data not available
1049;Error in line data
1050;No Agreement frequency and CBR input or PermFS is missing
2000;wrong Figure frequency (from Get_figure_FS_value) 
2001;wrong Time_percentage (from Get_figure_FS_value) 
2002;wrong Sea_temperature (from Get_figure_FS_value) 
2003;wrong Figure_Heff (from Get_figure_FS_value) 
2004;wrong Figure_distance (from Get_figure_FS_value)
3000;DLL inputstring too short
-1;unexpected Error
-2;HCM DLL not found
-3;HCM DLL entry point not found