# Hercules Version 3: System Messages: DG - DYNGUI.DLL

This page describes the DYNGUI.DLL messages for the Hercules S/370, ESA/390, and z/Architecture emulator.

### Messages

> `HHCDG001I dyngui.dll - name - version vers initiated`
> `HHCDG002I dyngui.dll terminated`
> `HHCDG003S select failed on input stream: errmsg`
> `HHCDG004S read failed on input stream: errmsg`
> `HHCDG005E Device query buffer overflow! (device=xxxx)`
> `HHCDG006S malloc pszInputBuff failed: errmsg`
> `HHCDG007S malloc pszCommandBuff failed: errmsg`

`HHCDG001I dyngui.dll - name - version vers initiated`

  Meaning
    The dyngui loadable module was successfully loaded and initiated.

  Action
    None. This message is informational only.

`HHCDG002I dyngui.dll terminated`

  Meaning
    The dyngui loadable module was successfully terminated.

  Action
    None. This message is informational only.

`HHCDG003S select failed on input stream: errmsg`

  Meaning
    The socket select function call failed on the input stream. `errmsg` describes the exact error.

  Action
    None; this is a fatal error; the system is immediately terminated.

`HHCDG004S read failed on input stream: errmsg`

  Meaning
    An unrecoverable i/o error occurred while reading from the input stream. `errmsg` describes the exact error.

  Action
    None; this is a fatal error; the system is immediately terminated.

`HHCDG005E Device query buffer overflow! (device=xxxx)`

  Meaning
    The device query buffer is not large enough to hold all of the information returned by the device handler. `xxxx` is the device whose information was being queried at the time the error occurred.

  Action
    The system attempts to continue functioning, but unpredictable results may occur (i.e. the system could crash). You should report this error to the Hercules developers immediately so that they can build you a new dyngui.dll with a larger device query buffer. Since the dyngui.dll is an unloadable module however, you will need to restart Hercules in order to begin using the newly fixed version of dyngui.dll.

`HHCDG006S malloc pszInputBuff failed: errmsg`

  Meaning
    There was not enough virtual memory on the host system to satisfy the malloc request for the input stream buffer. `errmsg` describes the exact error.

  Action
    None; this is a fatal error; the system is immediately terminated. You should increase the size of your host system's virtual memory allocation so that there is enough for Hercules to run, or else decrease the amount of memory that Hercules needs in order to run (e.g. decrease your `MAINSIZE` value).

`HHCDG007S malloc pszCommandBuff failed: errmsg`

  Meaning
    There was not enough virtual memory on the host system to satisfy the malloc request for the command processing buffer. `errmsg` describes the exact error.

  Action
    None; this is a fatal error; the system is immediately terminated. You should increase the size of your host system's virtual memory allocation so that there is enough for Hercules to run, or else decrease the amount of memory that Hercules needs in order to run (e.g. decrease your `MAINSIZE` value).

If you have a question about Hercules, see the Hercules Frequently-Asked Questions page.

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