XCOM using AT-TLS: XCOMM0780E "Txpi 215: Socket send error return value = 140"

Products

• XCOM Data Transport - z/OS
• XCOM Data Transport

Issue/Introduction

Configured Port 8045 as AT-TLS Secure port to connect to the mainframe z/OS server. Incoming transfers are failing with the following messages:

XCOMM0780E  IPv4  Txpi  215: Socket send error return value = 140                 
XCOMM0780E  IPv4  Txpi  228: Select exception condition for socket 0           


A second reported occurrence for a transfer between 2 LPARS in same Sysplex where AT-TLS had been configured for both LPARs in the same way with AT-TLS_PORTS = 8048. A TLS trace showed:

EZD1287I TTLS Error RC: 5003 Data Decryption 312                     
  LOCAL: ##.##.#.#..8048                                           
  REMOTE: ##.##.#.#..57729                                         
  JOBNAME: XCOM RULE: XCOM_Client_Rule                               
  USERID: VT#$@ GRPID: 00000036 ENVID: 00000000 CONNID: 0015B16C 

Job was also showing EZD1286I RC 202 and RC 5006 plus ACF2 USS violation report showed: 

R_datalib        XSSYT0   HT342              0           0
09/01/25  25.244   20.31.30 TCPIP             LPAR1     LPAR1
Failed - Profile for Ring_name not found                                                                            

R_datalib        XSSYT0   HT342              0           0
09/01/25  25.244   20.31.30 TCPIP             LPAR1     LPAR1
Failed - dbToken error.           

Environment

XCOM™ Data Transport® for z/OS 12.0

Cause

SSL certificate related.

Resolution

1. In the first reported occurrence the certificates had expired. To create new SSL certificates contact Security team and make sure to follow the procedures specified by your site in regards to using SSL certificates. 

2. In the second reported occurrence each certificate was valid but had been created primarily for the IP address (with host name and domain added to it).
After running the transfer job with STCIP and IPNAME set as IP addresses the transfer was successful.

Additional Information

Related article: XCOM configuration for AT-TLS