AR# 8939: 4.1i MAP - "ERROR:basmm:172 - Bad format for LOC constraint 171 on C_nMPC_Oe."
AR# 8939
4.1i MAP - "ERROR:basmm:172 - Bad format for LOC constraint 171 on C_nMPC_Oe."
描述
Keywords: MAP, error, basmm, 172, bad, format, LOC
Urgency: Standard
General Description: When I implement a design that has pin location constraints, the following error occurs if an incorrect pin name is used:
ERROR:basmm:172 - Bad format for LOC constraint 171 on C_nMPC_Oe. To bypass this error, set the environment variable 'XIL_MAP_LOCWARN'
解决方案
1
Make sure that the pin LOC constraint was specified correctly; for example, make sure that you specify "P171", and do not simply list "171" as the location.
Setting the XIL_MAP_LOCWARN environment variable will override the error, but will result in the invalid location constraint being ignored and the I/O being placed elsewhere. This causes a conflict with PCB layout.
2
This error may also appear if you attempt to lock a user I/O signal to a pin that is dedicated to a particular function (e.g., JTAG pins in a Virtex device). To determine which pins may be configured as user I/O, please see the "Pin Definitions" or "Pin Descriptions" section for the appropriate device in the Programmable Logic Data Book