Dear All,

I want to manage dabases in Environments of BDB.

My code is like this:

//-------------------------------------------------------------
DbEnv xmlEnv(0);
Db * ftdb;

xmlEnv.open(".//", DB_CREATE, 0);
ftdb = new Db(&xmlEnv, 0);
ftdb->open(NULL, "freqtable.db", NULL, DB_BTREE, DB_CREATE, 0);
//-------------------------------------------------------------

The compile is OK but there's an error when I run it.
The error is
Db:pen: Invalid arguments

Who can tell me what's wrong?

Thanks very much!
Joe

Can you turn on verbose error messages?

The Berkeley DB library optionally outputs a verbose error
message whenever it is about to return a general-purpose error,
or throw a non-specific exception. Whenever it is not clear why
an application call into Berkeley DB is failing, the first step
is always to turn on verbose error messages, which will almost
always explain the problem. For more information on turning on
verbose error messages, please see the "Run-time error
information" section of the Berkeley DB Reference Guide,
included in your download package and also available at:

http://www.sleepycat.com/docs/ref/debug/runtime.html

I would suggest turning on verbose error messages, and seeing
what output you get.

Ron

You might need to specific DB_INIT_MPOOL in the DbEnv:pen(...) call.
Like this:

xmlEnv.open(".//", DB_CREATE | DB_INIT_MPOOL, 0);