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
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