Error: missing operand at _@_ in expressin "_@_/1000.0" - Error: missing operand at _@_ in expressin "_@_/1000.0" Description The error may be seen in the Quartus® II software version 10.0 during Analysis & Synthesis when your design contains "QDR II and QDR II SRAM Controller with UniPHY" MegaCore®, targeting HardCopy® IV device. To workaround, modify <variation name> _timing.tcl with the following steps: Locate the following code in <variation name> _timing.tcl. set SSN(pushout_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSABSOLUTE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(pullin_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSABSOLUTE NONLEVELED MIN] -in_fitter]/-1000.0] set SSN(pushout_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSABSOLUTE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(pullin_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSABSOLUTE NONLEVELED MIN] -in_fitter]/-1000.0] set SSN(rel_pushout_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSRELATIVE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(rel_pullin_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSRELATIVE NONLEVELED MIN] -in_fitter]/-1000.0] set SSN(rel_pushout_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSRELATIVE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(rel_pullin_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSRELATIVE NONLEVELED MIN] -in_fitter]/-1000.0] Modify the above codes as follows: if { $::TimeQuestInfo(nameofexecutable) eq "quartus_map" } { set SSN(pushout_o) 0.0 set SSN(pullin_o) 0.0 set SSN(pushout_i) 0.0 set SSN(pullin_i) 0.0 set SSN(rel_pushout_o) 0.0 set SSN(rel_pullin_o) 0.0 set SSN(rel_pushout_i) 0.0 set SSN(rel_pullin_i) 0.0 } else { set SSN(pushout_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSABSOLUTE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(pullin_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSABSOLUTE NONLEVELED MIN] -in_fitter]/-1000.0] set SSN(pushout_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSABSOLUTE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(pullin_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSABSOLUTE NONLEVELED MIN] -in_fitter]/-1000.0] set SSN(rel_pushout_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSRELATIVE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(rel_pullin_o) [expr [get_micro_node_delay -micro SSO -parameters [list IO DQDQSRELATIVE NONLEVELED MIN] -in_fitter]/-1000.0] set SSN(rel_pushout_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSRELATIVE NONLEVELED MAX] -in_fitter]/1000.0] set SSN(rel_pullin_i) [expr [get_micro_node_delay -micro SSI -parameters [list IO DQDQSRELATIVE NONLEVELED MIN] -in_fitter]/-1000.0] } This issue is fixed in the Quartus II software version 10.0SP1. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['HardCopy™ IV E ASIC Devices', 'HardCopy™ IV GX ASIC Devices', 'Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']