Forum: GNU Radio New module not appearing in grc

Hi all,I created a module and added a block to it using 
gr_modtool.make-test showed pass for both tests.However, it is not 
appearing in grc. Instead when I use gnuradio-companion command it shows 
following in the terminal:[ehsan@GRB mygn]$ gnuradio-companion
** (process:5765): WARNING **: Trying to register gtype 
'GMountMountFlags' as enum when in fact it is of type 'GFlags'
** (process:5765): WARNING **: Trying to register gtype 
'GDriveStartFlags' as enum when in fact it is of type 'GFlags'
** (process:5765): WARNING **: Trying to register gtype 
'GSocketMsgFlags' as enum when in fact it is of type 'GFlags'Warning: 
Block validation failed: 
/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:1:0:ERROR:VALID:DTD_NOT_PCDATA: 
Element block was declared #PCDATA but contains non text 
nodes/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:2:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
category/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:3:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
import/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:4:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
make/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:6:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
key/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:7:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element
 sink/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:9:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
type/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:10:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
nports/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:12:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
source/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:14:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
type/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xml:15:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element nports  Ignoring: 
/usr/local/share/gnuradio/grc/blocks/howto_square2_ff.xmlWarning: Block 
validation failed: 
/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:1:0:ERROR:VALID:DTD_NOT_PCDATA: 
Element block was declared #PCDATA but contains non text
 nodes/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:2:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
category/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:3:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
import/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:4:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
make/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:6:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
key/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:7:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
sink/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:9:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
type/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:10:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
nports/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:12:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No
 declaration for element 
source/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:14:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element 
type/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xml:15:0:ERROR:VALID:DTD_UNKNOWN_ELEM: 
No declaration for element nports  Ignoring: 
/usr/local/share/gnuradio/grc/blocks/howto_square_ff.xmllinux; GNU C++ 
version 4.7.2 20120921 (Red Hat 4.7.2-2); Boost_104800; 
UHD_003.005.000-26-gb65a3924
<<< Welcome to GNU Radio Companion v3.6.3-6-gca407436 >>>
Loading: "/home/ehsan/mygn/Ssb.grc">>> DoneWhat commands should use: To 
check my module. To make it appear in GRC

Best Regards
Begh