"Sdcard not found" while booting from EMMC

vad

Hello!
Using debian 0.9.1 at piplus.
If I boot from SDcard, it boots well.  "install_to_emmc" is OK too.
If I boot from EMMC, it boots well too, however  sdcard does not seen by system!
(no mounts, fdisk -l sees only EMMC (mmcblk0 with its partitions), "sdcard not found" error  after "install_to_sdcard")
Yes, I insert sdcard after booting, because if I insert empty formatted sdcard before booting, booting stops after something like "cannot open console".
Some working sdcards were tried with the same result.   Any idea please?

vad

Thank you!  All ok now