NC_Net / Discussion / Help: NC_Net crashing on one server

We've got a site with about a dozen Win 2k3 servers running NC_Net with no problem - but one of them's just started falling over as soon as it's started.

Start the service, and it responds correctly - briefly. Then DW20 kicks in, 100% CPU for a minute, and NC_Net service stops.

EventVwr is showing these errors :-

---
Event Type:    Warning
Event Source:    NC_Net
Event Category:    None
Event ID:    9002
Date:        24/01/2007
Time:        10:03:13
User:        N/A
Computer:    <Host Name>
Description:
Failed to create instance mypc1:Input string was not in a correct format.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
---
Event Type:    Warning
Event Source:    NC_Net
Event Category:    None
Event ID:    9003
Date:        24/01/2007
Time:        10:03:14
User:        N/A
Computer:    <Host Name>
Description:
Failed to create instance mypc2:Input string was not in a correct format.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
---
Event Type:    Warning
Event Source:    NC_Net
Event Category:    None
Event ID:    9004
Date:        24/01/2007
Time:        10:03:15
User:        N/A
Computer:    <Host Name>
Description:
Failed to create instance mypc3:Input string was not in a correct format.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
---
Event Type:    Warning
Event Source:    NC_Net
Event Category:    None
Event ID:    9005
Date:        24/01/2007
Time:        10:03:16
User:        N/A
Computer:    <Host Name>
Description:
Failed to create instance mypc4:Input string was not in a correct format.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
---
Event Type:    Information
Event Source:    NC_Net
Event Category:    None
Event ID:    1004
Date:        24/01/2007
Time:        10:03:16
User:        N/A
Computer:    <Host Name>
Description:
NC_Net Service Started :
Date: 24/01/2007 10:03:16;

Version: NC_Net 3.05 03/10/06;
Script Path:C:\Program Files\Montitech\NC_Net\script\;
NC_Net Config Path: C:\Program Files\Montitech\NC_Net\config\;
Startup Config: C:\Program Files\Montitech\NC_Net\config\startup.cfg;
Passive Config: C:\Program Files\Montitech\NC_Net\config\passive.cfg;
Passive Check Log:C:\Program Files\Montitech\NC_Net\config\passive.log;

Active_check: True;
Lock_active_config: True;
Port: 1248;
Pass: None;
Active_timeout: 20;
Active_ip_accept_list: False;

Passive_check: False;
Lock_passive_config: False;
Port_passive: 5667;
Host_passive: "NC_Net_host_ID";
Ip_passive: "127.0.0.1";
Pass_passive: ;
Encrip_passive: 1;
Interval_passive: 5;
Interval_div_passive: 1;
Passive_alwayson:False;
Passive_timeout:10;

Cpu_max_interval: 60;
cpu_single: False;
perfdata_format: 2;
Testrun: False;

Embedded_send_nsca: True;
External_send_nsca: False;
External_send_nsca_app: ;
External_send_nsca_cfg: ;
External_send_nsca_ip: ;
External_send_nsca_port: 5667;
External_send_nsca_timeout: 10;

allow_run_scripts: False;
script_timeout: 30;
do_not_blaim_nc_net: False

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
---
Event Type:    Error
Event Source:    .NET Runtime 2.0 Error Reporting
Event Category:    None
Event ID:    5000
Date:        24/01/2007
Time:        10:03:20
User:        N/A
Computer:    <Host Name>
Description:
EventType clr20r3, P1 nc_net.exe, P2 0.3.2260.22905, P3 4411bac3, P4 mscorlib, P5 2.0.0.0, P6 4333ab80, P7 bd0, P8 59, P9 system.formatexception, P10 NIL.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 63 00 6c 00 72 00 32 00   c.l.r.2.
0008: 30 00 72 00 33 00 2c 00   0.r.3.,.
0010: 20 00 6e 00 63 00 5f 00    .n.c._.
0018: 6e 00 65 00 74 00 2e 00   n.e.t...
0020: 65 00 78 00 65 00 2c 00   e.x.e.,.
0028: 20 00 30 00 2e 00 33 00    .0...3.
0030: 2e 00 32 00 32 00 36 00   ..2.2.6.
0038: 30 00 2e 00 32 00 32 00   0...2.2.
0040: 39 00 30 00 35 00 2c 00   9.0.5.,.
0048: 20 00 34 00 34 00 31 00    .4.4.1.
0050: 31 00 62 00 61 00 63 00   1.b.a.c.
0058: 33 00 2c 00 20 00 6d 00   3.,. .m.
0060: 73 00 63 00 6f 00 72 00   s.c.o.r.
0068: 6c 00 69 00 62 00 2c 00   l.i.b.,.
0070: 20 00 32 00 2e 00 30 00    .2...0.
0078: 2e 00 30 00 2e 00 30 00   ..0...0.
0080: 2c 00 20 00 34 00 33 00   ,. .4.3.
0088: 33 00 33 00 61 00 62 00   3.3.a.b.
0090: 38 00 30 00 2c 00 20 00   8.0.,. .
0098: 62 00 64 00 30 00 2c 00   b.d.0.,.
00a0: 20 00 35 00 39 00 2c 00    .5.9.,.
00a8: 20 00 73 00 79 00 73 00    .s.y.s.
00b0: 74 00 65 00 6d 00 2e 00   t.e.m...
00b8: 66 00 6f 00 72 00 6d 00   f.o.r.m.
00c0: 61 00 74 00 65 00 78 00   a.t.e.x.
00c8: 63 00 65 00 70 00 74 00   c.e.p.t.
00d0: 69 00 6f 00 6e 00 20 00   i.o.n. .
00d8: 4e 00 49 00 4c 00 0d 00   N.I.L...
00e0: 0a 00                     ..
---

I've repaired the dotNet install, no difference.
I've tried to repair the NC_Net install, it fails - "The specified service already exists" (No, really...?)
I've tried to uninstall the NC_Net install, it fails - "An exception occurred while uninstalling. This exception will be ignored and the uninstall will continue. However, the application might not be fully inunstalled after the uninstall is complete --> The savedState dictionary contains inconsistent data and might have been corrupted."

Nagios' checks haven't been changed, and are the exact same checks running on a bunch of other servers with no problems. <touches wood quickly>

Any thoughts...? Everything else on the server (DNS/DHCP/AD domain controller) are all working fine.

NC_Net crashing on one server

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NC_Net crashing on one server