about abs() function in TCL

[karimtarbali]

Hi
i use this code :
for {set j 1} { $j <=$NTHA_Step } {incr j 1} {

set teta($j) [lindex $file_read $j]
set abs_teta($j) [expr abs ( $teta($j) ) ]
}
but i get this error : too few arguments for math function "abs"

i ckecked , the teta($j) s are calculated.
could you please tell me what i do wrong
thanks

[fmk]

it could be he end of file is causing you problems, put a puts right before the abs to see.

[silvia]

it may be the space between abs and the parenthesis