Just had the same problem in an Amazon Windows Server 2012 instance.
Restarting the instance fixed it for now.

On Fri, Aug 2, 2013 at 1:10 AM, garethm <gareth@...> wrote:

> **
>
>
> Hi,
>
> I have also had sporadic issues with this problem in our internal testing.
>
> Here are our observations:
> - We are currently using IBO-5.2.0 Build 6.
> - It can happen when connecting to a Firebird server using TCP and when
> using Firebird in embedded mode.
> - Once this happens, the only way to get applications that use IBObjects
> to connect to databases again appears to be to restart the computer.
> Neither restarting the application nor reinstalling the application make
> any difference.
> - Once this happens, our applications cannot connect to local or remote
> databases and both network and embedded Firebird connection attempts throw
> the same "ISC ERROR CODE: 335544648 unknown ISC error code 0" exceptions.
> - FlameRobin running on the computer experiencing the issues can connect
> to both local and remote databases without issue.
> - Our application running on other computers can connect to the Firebird
> server running on an affected machine without issue.
> - In one case, this happened after the user logged in to their computer
> via remote desktop, and we aren't sure about the other cases.
>
> Any advice on resolving this issue would be appreciated.
>
> Regards,
> Gareth Marshall
>
>
> --- In IBObjects@yahoogroups.com, Marcin Bury <marcin.bury@...> wrote:
> >
> > Hello
> >
> > I have recently upgraded IBO library to 5.2.0.7 (the latest version).
> > Everything works great except one customer environment. There is MS
> > Terminal Server where application compiled with latest IBO returns
> > following exception after connecting to the Firebird server
> [2.5.1.26266] :
> >
> > ISC ERROR CODE:335544648
> >
> > ISC ERROR MESSAGE:
> > unknown ISC error 0
> >
> > I did some searching and found that this error code represents following
> > error:
> >
> > 335544648 conn_lost Connection lost to pipe server
> >
> > I haven't noticed any similar behavior elsewhere.
> >
> > Below is attached call stack from EurekaLog.
> > Maybe someone will be able to suggest something how to find the cause of
> > the exception...
> >
> > Thanks
> > Marcin
> >
> >
> > |
> > |----------------------------------------------------------|
> > |7FFFFFFE|04 |00000000|0090D224|ZT_ML_115.exe|0050D224|IB_Session
> > |TIB_SessionBase|HandleException |1599[106] |
> > |00000040|04 |0012EB20|00719A46|ZT_ML_115.exe|00319A46|EInject
> > | |GetExceptionStackInfoHook |364[9] |
> > |00000040|03
> > |0012EB44|004492D8|ZT_ML_115.exe|000492D8|System.SysUtils|Exception
> > |RaisingException | |
> > |00000040|04 |0012FC9C|00968303|ZT_ML_115.exe|00568303|IB_Components
> > |TIB_Transaction|API_Start |20100[115] |
> > |00000040|04 |0012FD5C|0096651E|ZT_ML_115.exe|0056651E|IB_Components
> > |TIB_Transaction|SysStart |19021[11] |
> > |00000040|04 |0012FD68|0096773E|ZT_ML_115.exe|0056773E|IB_Components
> > |TIB_Transaction|SetStarted |19652[4] |
> > |00000040|04 |0012FD78|0092EC39|ZT_ML_115.exe|0052EC39|IB_Schema
> > | |GetOldParameterOrder |2163[14] |
> > |00000040|04 |0012FDFC|00960742|ZT_ML_115.exe|00560742|IB_Components
> > |TIB_Connection |SysAfterConnect |16677[38] |
> > |00000040|04 |0012FE60|009601BA|ZT_ML_115.exe|005601BA|IB_Components
> > |TIB_Connection |SysLogin |16491[23] |
> > |00000040|04 |0012FE78|009600A7|ZT_ML_115.exe|005600A7|IB_Components
> > |TIB_Connection |SysConnect |16454[14] |
> > |00000040|04 |0012FE88|0095CCED|ZT_ML_115.exe|0055CCED|IB_Components
> > |TIB_Connection |Connect |15426[7] |
> > |00000040|04 |0012FEA0|00F4102C|ZT_ML_115.exe|00B4102C|DM
> > |T_DM |Set_DB_Connection |453[8] |
> > |00000040|04 |0012FEC8|00F3F7A3|ZT_ML_115.exe|00B3F7A3|DM
> > |T_DM |DataModuleCreate |142[14] |
> > |00000040|03
> > |0012FEF4|004E946F|ZT_ML_115.exe|000E946F|System.Classes |TDataModule
> > |DoCreate | |
> > |00000040|03
> > |0012FF18|004E931C|ZT_ML_115.exe|000E931C|System.Classes |TDataModule
> > |AfterConstruction | |
> > |00000040|03
> > |0012FF40|004E92FA|ZT_ML_115.exe|000E92FA|System.Classes |TDataModule
> > |Create | |
> > |00000040|03 |0012FF74|007095E6|ZT_ML_115.exe|003095E6|Vcl.Forms
> > |TApplication |CreateForm | |
> > |00000040|04 |0012FFAC|014C8281|ZT_ML_115.exe|010C8281|ZT_ML
> > | |Initialization |92[5] |
> > |00000040|03 |0012FFC4|7C82F23B|kernel32.dll |0002F23B|kernel32
> > | |(possible ProcessIdToSessionId+521)| |
> >
>
>
>


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