Answers Database 2.1i: Hitop: hi429 - Cannot apply TIMESPEC on what seems to be a valid signal Record #6640 Product Family: Software Product Line: CPLD Implementation Product Part: hitop Product Version: 2.1i Problem Title: 2.1i: Hitop: hi429 - Cannot apply TIMESPEC on what seems to be a valid signal Problem Description: Urgency: Standard General Description: HITOP issues this warning similar to the following: WARNING:hi429 - Cannot apply TIMESPEC TS_ADDR_TO_A1_CS = MAXDELAY:FROM:ADDR:TO:A1_CS:10.000000 nS because of one of the following: (a) a signal name was not found; (b) a signal was removed or renamed due to optimization; (c) there is no path between the FROM node and TO node in the TIMESPEC. Solution 1: The Original TIMESPEC from the constraints editor looks like for example: NET "A1_CSB_" TNM = "A1_CS"; TIMEGRP "ADDR" = PADS("ADDR<*>"); TIMESPEC "TS_ADDR_TO_A1_CS" = FROM "ADDR" TO "A1_CS" 10.000000 ns; If it is added in the design.ucf as shown below it works: TIMESPEC "TS_ADDR_TO_A_CS" = FROM PADS(ADDR*) TO PADS(A1_CSB_) 10.000000 ns; The "" around the signal qualifier "ADDR<*>", i.e. TIMEGRP "ADDR" = PADS("ADDR<*>") should be "ADDR"   = PADS(ADDR<*>). The workaround is to remove the "" around the signal qualifier. End of Record #6640 - Last Modified: 08/11/99 18:18

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