Build Error - Digi ESP with NET+OS 7.42 for connect ME 9210

I have a legacy project that I need to just compile. I was given a copy of the project just as it was left by the engineer who made it over 10 years ago.

I installed Digi ESP with NET+OS 7.42 as that is the version the project was made with. I also made a couple of changes to some C:\netos74 files that the engineer noted in a txt file were modifications needed to work with the project.

I am encountering the following error and am stuck at this point:

**Cleaning up Bsp
Finished Building Bsp

Building target: image.elf
arm-elf-gcc -o image.elf ./web/RpPages.o ./web/RpUsrDct.o ./web/filelist_v.o ./web/index_v.o ./web/network_config_v.o ./web/reboot_status_v.o ./web/reboot_v.o ./web/session.o ./web/upload_firmware_v.o ./web/webmenu.o ./web/webutil.o ./web/wireless_ip_config_v.o ./web/wireless_network_config_v.o ./web/scripts/errhandler.o ./web/scripts/utils.o ./web/scripts/validation.o ./web/img/logo.o ./web/html/filelist.o ./web/html/index.o ./web/html/network_config.o ./web/html/reboot.o ./web/html/reboot_status.o ./web/html/upload_firmware.o ./web/html/wireless_ip_config.o ./web/html/wireless_network_config.o ./web/css/stylesheet.o ./sys/util/cpu_utilization.o ./sys/util/firmware.o ./sys/util/nsuptime.o ./sys/realport/realportsvr.o ./sys/http/cgi.o ./sys/http/file.o ./sys/http/httpsvr.o ./sys/http/security.o ./sys/graphics/wxapp.o ./sys/graphics/wxroot.o ./sys/ftp/ftpsvr.o ./sys/filesys/fileinit.o ./sys/cli/clisvr.o ./sys/cli/cliwireless.o ./sys/appservices.o ./ARC4.o ./DCMEFirmware.o ./Errors.o ./Globals.o ./ICSP.o ./Init.o ./NetBIOS.o ./OFITE_ADDP.o ./ProtBinary.o ./ProtBinaryTest.o ./ResetMon.o ./SimplyBlue.o ./UDPServer.o ./appconf_api.o ./dsPICFirmware.o ./root.o -mbig-endian -nostartfiles -mcpu=arm9tdmi -T bsp/7_4/connectme9210/ls/image.ld bsp/7_4/connectme9210/lib/reset.o /cygdrive/C/netos74/lib/arm9/32b/gnu/memcpy.o /cygdrive/C/netos74/lib/32b/gnu/crt0.o /cygdrive/C/netos74/lib/32b/gnu/crti.o /cygdrive/C/netos74/lib/32b/gnu/crtbegin.o /cygdrive/C/netos74/lib/32b/gnu/crtend.o /cygdrive/C/netos74/lib/32b/gnu/crtn.o -Wl,--start-group bsp/7_4/connectme9210/lib/libbsp.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libflashdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libsntpdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libposixdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libdnsclntdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libtcpip_no_ipsecdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libtxdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libaddpdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libtelnsvrdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libcryptodbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libfilesysdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libftpsvrdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libemailcdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/librphttpddbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libmanapidbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/librealportdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libsshdbg.a /cygdrive/C/netos74/lib/arm9/32b/gnu/libssldbg.a -L /cygdrive/C/netos74/lib/32b/gnu -lc -lgcc -lm -lstdc++ -Wl,--end-group -Wl,-Map,image.map
bsp/7_4/connectme9210/lib/libbsp.a(iamParams.o): In function `customizeIamGetDefaultEthernetConfig':
./customize/iamParams.c:392: undefined reference to `NAGetAppPrimaryDns'
./customize/iamParams.c:396: undefined reference to `NAGetAppSecondaryDns'
bsp/7_4/connectme9210/lib/libbsp.a(iamParams.o): In function `customizeIamGetDefaultWirelessConfig':
./customize/iamParams.c:524: undefined reference to `NAGetApp2ndInterfacePrimaryDns'
./customize/iamParams.c:528: undefined reference to `NAGetApp2ndInterfaceSecondaryDns'
collect2: ld returned 1 exit status
make: *** [image.elf] Error 1
make: Target `all' not remade because of errors.
Build complete for project Universal DCME

Any help or guidance appreciated.

The error seems to be pretty self-explanatory:

./customize/iamParams.c:392: undefined reference to `NAGetAppPrimaryDns’

is NAGetAppPrimaryDns defined in the netos version you are using? anywhere in header files? Is the appropriate header file included in the C file generating the error?
in netos 7.5 it is defined in C:\netos75\h\appconf_api.h

and that header file is included in C:\netos75\src\bsp\customize\iamParams.c