sybase ct-lib 错误

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程序在使用ct_fetch提取一批数据后，下次在去提取就出现下面的错误，
2004/06/25 10:56:04 INF select user queue ct_fetch failed
2004/06/25 10:56:04 ERR Client Library error:severity(0),number(163),origin(1),layer(1),ct_results(): user api layer: external error: This routine cannot be called until all fetchable results have been completely processed.
2004/06/25 10:56:04 ERR ct_results() returned CS_FAIL.
2004/06/25 10:56:04 ERR Client Library error:severity(0),number(159),origin(1),layer(1),ct_cmd_drop(): user api layer: external error: This routine can be called only if the command structure is idle.
2004/06/25 10:56:04 INF start to Modify HLR Information[user=13246200008,user queue id=255]
2004/06/25 10:56:04 ERR Client Library error:severity(0),number(49),origin(1),layer(1),ct_send(): user api layer: external error: This routine cannot be called because another command structure has results pending.
2004/06/25 10:56:04 ERR Client Library error:severity(0),number(156),origin(1),layer(1),ct_results(): user api layer: external error: This routine cannot be called when a command has been initialized but not sent.
2004/06/25 10:56:04 ERR ct_results() returned CS_FAIL.

然后退出程序出现如下错误

2004/06/25 11:05:39 ERR Client Library error:severity(0),number(49),origin(1),layer(1),ct_close(): user api layer: external error: This routine cannot be called because another command structure has results pending.
2004/06/25 11:05:39 ERR Fatal error: ct_close failed

2004/06/25 11:05:39 ERR Fatal error: ct_con_drop failed

2004/06/25 11:05:39 ERR Fatal error: ct_exit failed

2004/06/25 11:05:39 ERR Fatal error: cs_ctx_drop failed

再次重启程序还是无法操作sybase
2004/06/25 10:56:13 ERR ct_results() returned CS_FAIL.
2004/06/25 10:56:13 ERR Client Library error:severity(0),number(159),origin(1),layer(1),ct_cmd_drop(): user api layer: external error: This routine can be called only if the command structure is idle.
2004/06/25 10:56:13 ERR Client Library error:severity(0),number(49),origin(1),layer(1),ct_send(): user api layer: external error: This routine cannot be called because another command structure has results pending.
2004/06/25 10:56:13 ERR Client Library error:severity(0),number(156),origin(1),layer(1),ct_results(): user api layer: external error: This routine cannot be called when a command has been initialized but not sent.
2004/06/25 10:56:13 ERR ct_results() returned CS_FAIL.
2004/06/25 10:56:13 ERR Client Library error:severity(0),number(159),origin(1),layer(1),ct_cmd_drop(): user api layer: external error: This routine can be called only if the command structure is idle.