how to solve "invalid command name "fsdbreport"! "

Question

i'm trying to get some simulation data from fsdb file to txt file with the follwing code:

#getData.tcl

set fsdbPath "../asrcsim.fsdb"
set signalPath "chanIdTest/u_asrc"

fsdbreport $fsdbPath \
-exp "$signalPath/clk==1 && $signalPath/we==1" \
-s \
$signalPath/coe_out -of d \
$signalPath/chnid -of d \
-o debug.txt

in bash:

i tried "source getData.tcl" and i got "Variable name must begin with a letter"

then

i tried "tclsh getData.tcl" and i got " invalid command name "fsdbreport" "

then i got into tclsh mode and execute the code in line, it works well.