How to Configure SNA Service TPs in the Registry

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Article ID: 148970 - View products that this article applies to.
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Chapter 2 of the Microsoft SNA Server 2.0, 2.1, and 2.11 APPC and CPIC [ASCII 147]Programmer[ASCII 146]s Guide[ASCII 148] describes the configuration entries necessary to define a transaction program (TP) to SNA Server. The first eight characters of the TP name are configured as the Microsoft Windows NT or Microsoft Windows 95 service key name in the registry for 32-bit Windows applications, in the [SnaServerAutoTPs] section in Win.ini file for Microsoft Windows 3.x applications or SNA.INI for OS/2 applications.

However, SNA "service" TP names have two to four characters names where the first character starts with an EBCDIC hexadecimal number from X'00' to X'3F'. Because the names cannot be converted into a valid registry service key name or Win.ini or Sna.ini file entry, SNA Server maps the following values onto the name to represent this first non-printable character as follows:
0x07 - "DDM"
0x20 - "DIA"
0x21 - "SNAD"
0x24 - "FS"
0x30 - "PO"
All others are prefixed by "UN" for unknown.

For example, the AS/400 communications TP name supporting 5250 display emulation is called X'30F0F0F5'. To define this name in the registry (for Windows NT or Windows 95 clients), in the Win.ini file (for Windows 3.x clients), or the Sna.ini file (for OS/2 clients), the TP name should be configured as:
where "PO" represents X'30', 'X'F0 converts to the number "0" and 'X'F5 converts to the number "5".


The above information is included at the end of Chapter 2 of the SNA Server APPC and CPIC "Programmer's Guide", though the documentation only mentions support for Windows 3.x and OS/2 clients, when in fact it applies to Windows NT and Windows 95 as well.


The configuration requirements for service TPs is provided in this article. This information will be included a future version of the APPC and CPIC "Programmer's Guide."


Microsoft has confirmed this to be a problem in SNA Server versions 2.0, 2.1, 2.11, and 2.11 Service Pack 1. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.


Article ID: 148970 - Last Review: February 28, 2014 - Revision: 3.0
  • Microsoft SNA Server 2.0, when used with:
    • Microsoft Windows NT 4.0
  • Microsoft SNA Server 2.1, when used with:
    • Microsoft Windows NT 4.0
  • Microsoft SNA Server 3.0, when used with:
    • Microsoft Windows NT 4.0
  • Microsoft SNA Server 2.11 Service Pack 1, when used with:
    • Microsoft Windows NT 4.0
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