Re: Error when using systemfunc in NCL 5.2.x under cygwin

Hi,

I was unable to reproduce your problem under Cygwin and NCL 5.2.1. I had just upgraded
my Cygwin last week, too.

Do you actually get the error right away, after just a few iterations? Your program ran all the
way to i=999 on my box.

--Mary

On Jul 26, 2010, at 8:22 AM, Hoffman Cheung wrote:

> Hello,
>
> I have encountered a problem when executing the NCL script under cygwin (in Windows Vista/7) in the two latest versions (i.e. NCL 5.2.0 and 5.2.1). When my program try to use the function systemfunc, it always ends accidentally due to an unexpected error. An example in given below:
>
> ************************************************************************************
> Script (test_ncl521.ncl)
>
> 1. ; script test_ncl521.ncl
> 2.
> 3. system("date")
> 4. print(sprinti("%03i",ispan(-100,100,1)))
> 5.
> 6. system("date")
> 7. do n = -10, 10
> 8. print("n = " + n)
> 9. end do
> 10.
> 11. system("date")
> 12. do i = 0, 999
> 13. print(i + " " + systemfunc("date"))
> 14. end do
>
>
> ************************************************************************************
> Output
>
>
> Mon Jul 26 21:33:24 2010
> Mon Jul 26 21:33:24 2010
> Mon Jul 26 21:33:24 2010
> Copyright (C) 1995-2010 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 5.2.1
> The use of this software is governed by a License Agreement.
> See http://www.ncl.ucar.edu/ for more details.
> (0) -100
> (1) -99
> (2) -98
> (3) -97
> (4) -96
> (5) -95
> (6) -94
> (7) -93
> (8) -92
> (9) -91
> (10) -90
> (11) -89
> (12) -88
> (13) -87
> (14) -86
> (15) -85
> (16) -84
> (17) -83
> (18) -82
> (19) -81
> (20) -80
> (21) -79
> (22) -78
> (23) -77
> (24) -76
> (25) -75
> (26) -74
> (27) -73
> (28) -72
> (29) -71
> (30) -70
> (31) -69
> (32) -68
> (33) -67
> (34) -66
> (35) -65
> (36) -64
> (37) -63
> (38) -62
> (39) -61
> (40) -60
> (41) -59
> (42) -58
> (43) -57
> (44) -56
> (45) -55
> (46) -54
> (47) -53
> (48) -52
> (49) -51
> (50) -50
> (51) -49
> (52) -48
> (53) -47
> (54) -46
> (55) -45
> (56) -44
> (57) -43
> (58) -42
> (59) -41
> (60) -40
> (61) -39
> (62) -38
> (63) -37
> (64) -36
> (65) -35
> (66) -34
> (67) -33
> (68) -32
> (69) -31
> (70) -30
> (71) -29
> (72) -28
> (73) -27
> (74) -26
> (75) -25
> (76) -24
> (77) -23
> (78) -22
> (79) -21
> (80) -20
> (81) -19
> (82) -18
> (83) -17
> (84) -16
> (85) -15
> (86) -14
> (87) -13
> (88) -12
> (89) -11
> (90) -10
> (91) -09
> (92) -08
> (93) -07
> (94) -06
> (95) -05
> (96) -04
> (97) -03
> (98) -02
> (99) -01
> (100) 000
> (101) 001
> (102) 002
> (103) 003
> (104) 004
> (105) 005
> (106) 006
> (107) 007
> (108) 008
> (109) 009
> (110) 010
> (111) 011
> (112) 012
> (113) 013
> (114) 014
> (115) 015
> (116) 016
> (117) 017
> (118) 018
> (119) 019
> (120) 020
> (121) 021
> (122) 022
> (123) 023
> (124) 024
> (125) 025
> (126) 026
> (127) 027
> (128) 028
> (129) 029
> (130) 030
> (131) 031
> (132) 032
> (133) 033
> (134) 034
> (135) 035
> (136) 036
> (137) 037
> (138) 038
> (139) 039
> (140) 040
> (141) 041
> (142) 042
> (143) 043
> (144) 044
> (145) 045
> (146) 046
> (147) 047
> (148) 048
> (149) 049
> (150) 050
> (151) 051
> (152) 052
> (153) 053
> (154) 054
> (155) 055
> (156) 056
> (157) 057
> (158) 058
> (159) 059
> (160) 060
> (161) 061
> (162) 062
> (163) 063
> (164) 064
> (165) 065
> (166) 066
> (167) 067
> (168) 068
> (169) 069
> (170) 070
> (171) 071
> (172) 072
> (173) 073
> (174) 074
> (175) 075
> (176) 076
> (177) 077
> (178) 078
> (179) 079
> (180) 080
> (181) 081
> (182) 082
> (183) 083
> (184) 084
> (185) 085
> (186) 086
> (187) 087
> (188) 088
> (189) 089
> (190) 090
> (191) 091
> (192) 092
> (193) 093
> (194) 094
> (195) 095
> (196) 096
> (197) 097
> (198) 098
> (199) 099
> (200) 100
> (0) n = -10
> (0) n = -9
> (0) n = -8
> (0) n = -7
> (0) n = -6
> (0) n = -5
> (0) n = -4
> (0) n = -3
> (0) n = -2
> (0) n = -1
> (0) n = 0
> (0) n = 1
> (0) n = 2
> (0) n = 3
> (0) n = 4
> (0) n = 5
> (0) n = 6
> (0) n = 7
> (0) n = 8
> (0) n = 9
> (0) n = 10
> (0) 0 Mon Jul 26 21:33:24 2010
> (0) 1 Mon Jul 26 21:33:24 2010
> (0) 2 Mon Jul 26 21:33:24 2010
> (0) 3 Mon Jul 26 21:33:25 2010
> fatal:systemfunc: cannot create child process:[errno=11]
>
> fatal:Execute: Error occurred at or near line 13 in file test_ncl521.ncl
>
> ************************************************************************************
>
> The error still exists after I updated the cygwin. Indeed, this seldom happened in any other old versions that I have ever used (from NCL 5.0.0).
>
> How can I solve the problem? Thanks!
>
>
> Best Regards,
> Hoffman
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Received on Mon Jul 26 16:41:30 2010