请教：关于Protel文件（.pcb）转换为Allegro文件（.brd）

关于Protel文件（.PCB）转换为Allegro文件（.brd）：
解决方案：有篇文档，思想是先使用Layout plus将Protel文件（.pcb）转换为.max文件，再使 用 Layout 2 Allegro 将其转换为.brd文件。
问题是：在第二步转换时遇到以下问题导致不能正常转换：
Layout To PCBEditor Version 15.7.0
Copyright 1985-2006 Cadence Design Systems, Inc.
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '1_NONCOMP1'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '1_NONCOMP2'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '2_NONCOMP3'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '3_NONCOMP4'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '4_NONCOMP5'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '5_NONCOMP6'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '6_NONCOMP7'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '7_NONCOMP8'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '8_NONCOMP9'
。。。
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '92_NONCOMP101'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '93_NONCOMP102'
WARNING (Layout To PCBEditor), Empty mechanical pins were discarded from footprint '102_NONCOMP119'
ERROR (Layout To PCBEditor), Fatal error processing MAX file...see LAYOUT.LOG for information.
Netlist Warnings and Errors recorded in 'E:\test\netin.log':

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请高手指教！
亦或有其他更好的转换方法，请指教！
谢谢！