The 'UNITS' attribute should be set in the first lef file (technology lef)

Hi everyone,

I'm trying to use Cadence Encounter to place and route my design in 130 nm UMC technology. I've already characterized my self-defined standard cell library using ELC. I'm sourcing the .lef file of my self-designed standard cell library after the actual technology header .lef file. I'm getting the following when running the P&R:

Loading Lef file ...lef

Loading Lef file ...lef

**WARN: (ENCLF-246):    The 'UNITS' attribute should be set
in the first lef file (technology lef). There is an attempt to set it
in subsequent lef files which will be ignored.

**ERROR: (ENCLF-111):   Layer ... is not defined

**ERROR: (ENCLF-224):   Failed to create via ...

**ERROR: (ENCLF-3):     Error found when processing LEF file ...lef

**ERROR: (ENCSYT-6692): [par.tcl]: Invalid return code while executing "par.tcl"

It seems to me that the .lef file of my standard cell library tries to specify the layers and vias characteristics of the technology which has already been specified in the actual technology .lef file. Or there might be some other problems with my .lef file? Please help me.

Regards,

Mahmoud