Solution: The package R.oo used by R.matlab has a function called getDate. I was loading --another function getDate() before loading the R.matlab package.

---

I can't load the R package R.matlab  

Anyone has the same issue? I have the following error message:

```
Loading required package: R.matlab
Error in as.POSIXlt.POSIXct(x, tz) : invalid 'tz' value
Error: package 'R.matlab' could not be loaded

```

Edit: it happens since the last update on 3rd of Feb 2011

```
> sessionInfo()    
R version 2.12.1 (2010-12-16)    
Platform: i386-pc-mingw32/i386 (32-bit)    
locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252           LC_MONETARY=English_United States.1252 LC_NUMERIC=C                           LC_TIME=English_United States.1252    
attached base packages:
[1] grDevices datasets  splines   graphics  stats     tcltk     utils     methods   base     
other attached packages: [1] R.oo_1.7.5                   R.methodsS3_1.2.1            waveslim_1.6.4               timeDate_2130.91             ncdf_1.6.5                   rgl_0.92.798                
 [7] fields_6.3                   spam_0.23-0                  splancs_2.01-27              sp_0.9-76                    maps_2.1-5                   shapefiles_0.6              
[13] foreign_0.8-41               scrapeR_0.1.6                XML_3.2-0.2                  mFilter_0.1-3                RCurl_1.5-0.1                bitops_1.0-4.1              
[19] outliers_0.14                chron_2.3-39                 lmtest_0.9-27                PerformanceAnalytics_1.0.3.2 RODBC_1.3-2                  quantmod_0.3-15             
[25] TTR_0.20-2                   xts_0.7-5                    zoo_1.6-4                    Defaults_1.1-1               rcom_2.2-3.1                 rscproxy_1.3-1              
[31] svSocket_0.9-51              TinnR_1.0.3                  R2HTML_2.2                   Hmisc_3.8-3                  survival_2.36-2             
loaded via a namespace (and not attached):
[1] cluster_1.13.2  grid_2.12.1     lattice_0.19-17 svMisc_0.9-61   tools_2.12.1   

```