# Compiling error 3

**URL:** <https://forum.liquidinstruments.com/t/compiling-error-3/1027>\
**Category:** Moku Cloud Compile\
**Created:** [August 29, 2024, 2:50pm UTC](https://forum.liquidinstruments.com/t/compiling-error-3/1027 "2024-08-29T14:50:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![clock](https://avatars.discourse-cdn.com/v4/letter/c/e19adc/32.png) [@clock](https://forum.liquidinstruments.com/u/clock)\
**Post date:** [August 29, 2024, 2:50pm UTC](https://forum.liquidinstruments.com/t/compiling-error-3/1027/1 "2024-08-29T14:50:41Z")

</div>

Hello,

## The following error occurs during the compile process. Even the code that successfully compiled before has started failing. What could be the problem?

vivado -nojournal -mode batch -source /deps/compile/scripts/synth.tcl -tclargs 12 4 4 4

source /deps/compile/scripts/synth.tcl

# set TOP\_DIR $::env(TOP\_DIR)

# set HW\_VER $::env(HW\_VER)

# set HG\_PART $::env(HG\_PART)

# set HG\_BOARD $::env(HG\_BOARD)

# set SRC\_DIR $::env(SRC\_DIR)

# set NUM\_INS [lindex $argv 0]

# set NUM\_OUTS [lindex $argv 1]

# set NUM\_SLOT\_AIN [lindex $argv 2]

# set NUM\_SLOT\_AOUT [lindex $argv 3]

# set NUM\_CBUFS [lindex $argv 4]

# set IN\_MODE [lindex $argv 5]

# set OUT\_MODE [lindex $argv 6]

# set NUM\_LOOPS [lindex $argv 7]

# set VARIANT [lindex $argv 8]

missing operand at _@_  
in expression “4 +_@_”  
(parsing expression “4 +”)  
invoked from within  
“expr $NUM\_SLOT\_AIN + $NUM\_LOOPS”  
invoked from within  
“set NUM\_SLOT\_AIN [expr $NUM\_SLOT\_AIN + $NUM\_LOOPS]”  
(file “/deps/compile/scripts/synth.tcl” line 17)  
INFO: [Common 17-206] Exiting Vivado at Thu Aug 29 14:46:23 2024…