Umount: mnt/trdx-rootfs: not mounted

i flash the aplais imx6 version in to sd card. but i found this on terminal. does it effect further or not?
and what does it mean

No, this message can be ignored. Our scripts just make sure nothing is mounted there prior to us loop mounting the image file in order to populate it. In case of an error or if a user would somehow prematurely cancel an update operation it could be left behind still mounted which this prevents.

I am also getting the issue while creating SD boot-able for Apalis TK1
and for that I ran the following command
./ -m 2 -o /media/usaername/NewVol/

and getting out put as:

root@hscuser-OptiPlex-3046:~/APALISTK1-Buils/Apalis-TK1_LXDE-Image_2.7.2# ./ -m 2 -o /media/hscuser/New\ Volume1/
Apalis TK1 rootfs specified
Image file apalis-tk1.img has been successfully generated!
Creating MBR file and do the partitioning
0+0 records in
0+0 records out
0 bytes (0 B) copied, 7.8444e-05 s, 0.0 kB/s
Model: (file)
Disk /home/hscuser/APALISTK1-Buils/Apalis-TK1_LXDE-Image_2.7.2/apalis-tk1_bin/mbr.bin: 30760960s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 8192s 40959s 32768s primary lba
2 40960s 30719999s 30679040s primary
Creating VFAT partition image with the kernel
mkfs.fat 3.0.26 (2014-03-07)
mkfs.fat: warning - lowercase labels might not work properly with DOS or Windows
Creating rootfs partition image
504+0 records in
504+0 records out
528482304 bytes (528 MB) copied, 0.207803 s, 2.5 GB/s
mke2fs 1.42.9 (4-Feb-2014)
Discarding device blocks: done
Filesystem label=rootfs
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, Stripe width=0 blocks
129024 inodes, 516096 blocks
25804 blocks (5.00%) reserved for the super user
First data block=1
Maximum filesystem blocks=67633152
63 block groups
8192 blocks per group, 8192 fragments per group
2048 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
tune2fs 1.42.9 (4-Feb-2014)
Setting maximal mount count to -1
Setting interval between checks to 0 seconds
umount: mnt/tdx-rootfs: not mounted
Script aborted unexpectedly…

I have followed to install nvidia jetpack with l4t on apalis-tk1 and to test it i wanted to boot it from SD card but update script is not working.

Please suggest what to do next to boot from SD, OR anyone has done NFS boot for Apalis-TK1 then please share how to do NFS boot.

Have I missed anything or did you just hijack this thread? Please ask a new question, thanks!