In the .js script (n-1) secure channels with sessions are opened, where n is the maximum number of supported secure channels. After 5 secure channels are opened, without any sessions. It is checked if at least the 5th is still open at the end of this test. The other 4 might be already deleted by the server.

The script not only removed the 4 sessions, which might be deleted, it removes 5 (for ( i = ( channels.length - 6 ); i < ( channels.length - 1 ); i++ ) ). This leads to a crash, if only one secure channel is supported. This is allowed in the Nano Profile.

The following lines should be updated, replacing both "6" by "5".

    // close all channels that did not have a session; all except the last should fail with BadSecureChannelIdInvalid
    addLog( "Step 4: Remove all remaining SecureChannels, all-but-one should fail; the last channel should delete successfully." );
    for ( i = ( channels.length - 6 ); i < ( channels.length - 1 ); i++ ) if ( !CloseSecureChannelHelper.Execute( { Channel: channels[i], ServiceResult: new ExpectedAndAcceptedResults( [StatusCode.BadSecureChannelIdInvalid, StatusCode.BadInvalidState], StatusCode.Good ) } ) ) result = false;
    if ( !CloseSecureChannelHelper.Execute( { Channel: channels[( channels.length - 1 )], ServiceResult: new ExpectedResults( { Expected: [StatusCode.Good] } ) } ) ) result = false;
    for ( i = 0; i < ( channels.length - 6 ); i++ ) if ( !CloseSecureChannelHelper.Execute( { Channel: channels[i], ServiceResult: new ExpectedAndAcceptedResults( StatusCode.Good ) } ) ) result = false;