Logical Channels and Opening An Application

Question

Hello,
Upon sending an APDU to a Java Card (a GEM card) to open a channel, it works fine. But when I try to select an application on that new logical channel which is in the secured state, it always gives back an error, but I can select that same application from the basic channel. Do I need to do something else besides simply opening the new logical channel to let it be able to select applications in the secured state?
Thanks,
Mizax

Answer 1

Hello,
Thanks for your response.
Yes I'm sure the card supports multiple logical channels, I've checked the historical bytes, and am able to open the number of logical channels the historical bytes say I should.
I can select other applications on the new logical channel and send commands to them, that works fine. When selecting a secured application, it fails with error code. In particular, I'm trying to select the card manage application, and that fails. Although this shouldn't be necessary, I make sure the basic channel doesn't have the card manager selected also:
Log:
Warm Reset Card
Open Logical Channel 1
Command: 00 70 00 01
Response: 90 00
Select some other App on the Basic Channel:
Command: 00 A4 04 00 0F A0 00 00 00 18 50 21 00 00 00 00 00 57 49 42
Response: 90 00
Select card manager on Channel 1:
Command: 01 A4 04 00 07 A0 00 00 00 18 43 4D
Response: 6E 00
To sum up: Open a new logical channel, select some other app on the basic channel, try to select the card manager on the new logical channel, it fails. If I then reselect the card manager on the basic channel, it works fine. I can select other non-secured apps on the new logical channel, and that works fine too. In any of the cases I mention, I ensure that only one channel is trying to select an app, so that I'm not worrying about the issue of whether an app is multi-selectable.
I've been wrestling and googling this for hours with no luck. Any help would be greatly appreciated.
Thanks,
Mizax