snmp_build: unknown failuresnmpd: send_trap: Error building ASN.1 representation (Can't build OID for variable)

Hi, 

I'm working on Project where we use Net-SNMP, we've wrotten a small
Subagent which informs about our Server status. Some time ago we did
switch from ucd-snmp to Net-SNMP. 
We use our Subagent to send traps througth Net-SNMP. The problem is, at
some time (unknow) wan't the Net-SNMP send no traps more, in logs look
it different somteimes send 300 Traps sometime just 100. In our Agent I
did't found any problem, in log of net-snmp can i see this messages (see
below).
I have no idea what ca it be. Please help, I'm using Net-SNMP 5.2.4 and
5.4 on Linux and Net-SNMP is started with following parameters:

	./sbin/snmpd -d -LF d /var/log/net-snmpd.log -p
/var/run/snmpd.pid -x /var/agentx/master 

Error which can I see in log of net-snmp:

snmp_build: unknown failuresnmpd: send_trap: Error building ASN.1
representation (Can't build OID for variable)

Sending 300 bytes to Local IPC: /var/agentx/master
0000: 01 12 00 00  06 00 00 00  00 00 00 00  59 3A B5 05
............Y:..
0016: 18 01 00 00  7D B8 0B 00  00 00 00 00  43 00 00 00
....}.......C...
0032: 04 02 00 00  01 00 00 00  01 00 00 00  03 00 00 00
................
0048: 00 00 00 00  7C B8 0B 00  06 00 00 00  06 06 00 00
....|...........
0064: 03 00 00 00  01 00 00 00  01 00 00 00  04 00 00 00
................
0080: 01 00 00 00  00 00 00 00  05 04 01 00  01 00 00 00
................
0096: 88 1F 00 00  04 00 00 00  00 00 00 00  AA 3A 0C 00
.............:..
0112: 04 00 00 00  03 00 00 00  03 00 00 00  01 00 00 00
................
0128: 00 00 00 00  05 00 00 00  4F 35 30 30  41 00 00 00
........O500A...
0144: 04 00 00 00  03 00 00 00  03 00 00 00  02 00 00 00
................
0160: 00 00 00 00  15 00 00 00  4F 35 30 30  41 2E 30 30
........O500A.00
0176: 32 32 2E 30  30 30 31 31  36 30 35 30  33 00 00 00
22.0001160503...
0192: 04 00 00 00  03 00 00 00  03 00 00 00  03 00 00 00
................
0208: 00 00 00 00  0E 00 00 00  43 41 4C 4C  2E 53 4E 4D
........CALL.SNM
0224: 50 2E 54 45  53 54 00 00  04 00 00 00  03 00 00 00
P.TEST..........
0240: 03 00 00 00  04 00 00 00  00 00 00 00  11 00 00 00
................
0256: 45 69 6E 20  53 4E 4D 50  20 54 65 73  74 20 2E 2E    Ein SNMP
Test ..
0272: 2E 00 00 00  02 00 00 00  03 00 00 00  03 00 00 00
................
0288: 08 00 00 00  00 00 00 00  6C 07 00 00                 ........l...

For generating the Trap i'm using following steps (found in some
example): 

	struct variable_list *list=NULL;
	
	...
	snmp_varlist_add_variable(&list, (oid*)id, oid_length,
ASN_(depends, INTEGER or STRING), (unsigned char*)var.value, var.len);
	... 
	
	send_trap_vars(SNMP_TRAP_ENTERPRISESPECIFIC, code, list);

	snmp_free_varbind(list);

Thanks, peter

PS: any input is welcome


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