While xlsReadWrite[Pro] should be considered as deprecated we have just released xlsReadWrite v1.5.5 and xlsReadWritePro v1.6.5 which support again the latest R version. The check has been executed with 32-bit R3.0.3 on Windows 8.1 and all our (many) R unit tests did run successfully.
But why is it deprecated when it runs well?
There are three reasons: 1. it only runs with the 32-bit R version, 2. there is neither crossplatform nor xlsx support and 3. we no longer maintain a Delphi toolchain**
**to be honest, this new package versions were not compiled but we directly modified the assembler code to make it R3.x compatible (different argument checking in .External register call, iirc). Because of this 'hack' we didn't like the thought to make it officially available (but people kept asking…)