Hi After installing the FCD block downloaded from CGRAN website, i opened gnuradio-companion and it doesn't contain FCD blocks.
When I look into the terminal, I seen the following errors: Please kindly look into this and help me in this regard. I am using GNU Radio 3.4.0 Warning: Block validation failed: /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:2:0:ERROR:VALID:DTD_NOT_PCDATA: Element block was declared #PCDATA but contains non text nodes /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:4:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:5:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element category /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:6:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element throttle /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:7:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element import /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:8:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element make /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:23:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element callback /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:24:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element callback /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:25:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element callback /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:26:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element callback /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:27:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element callback /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:28:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:30:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:31:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:32:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:33:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element hide /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:35:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:37:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:38:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:39:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:41:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:43:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:44:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:45:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:47:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:49:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:50:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:51:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:53:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:55:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:56:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:57:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:59:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:61:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:62:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:63:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:65:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:67:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:68:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:69:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:71:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element param /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:73:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element key /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:74:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element value /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:75:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:77:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element check /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:78:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element check /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:79:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element check /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:80:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element check /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:81:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element check /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:82:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element source /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:84:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element type /usr/local/share/gnuradio/grc/blocks/fcd_source_c.xml:86:0:ERROR:VALID:DTD_UNKNOWN_ELEM: No declaration for element doc Thanks Senthil
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