Running examples in 'TexMix-Ex.R' failed
The error most likely occurred in:

> ### Name: foodStoresShp
> ### Title: Point layer of Stores selling Food in Dallas County, TX
> ### Aliases: foodStoresShp
> 
> ### ** Examples
> 
> library(spatstat)
Loading required package: spatstat.data
Loading required package: spatstat.geom
spatstat.geom 1.65-5
Loading required package: spatstat.core
Loading required package: nlme
Loading required package: rpart
spatstat.core 1.65-5
Loading required package: spatstat.linnet

spatstat 2.0-1       (nickname: 'Caution: contains small parts') 
For an introduction to spatstat, type 'beginner' 

> library(rgdal)
Loading required package: sp
rgdal: version: 1.5-23, (SVN revision 1121)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 3.2.1, released 2020/12/29
Path to GDAL shared files: D:/temp/RtmpqUvQfr/RLIBS_8e281232ba7/rgdal/gdal
GDAL binary built with GEOS: TRUE 
Loaded PROJ runtime: Rel. 7.2.1, January 1st, 2021, [PJ_VERSION: 721]
Path to PROJ shared files: D:/temp/RtmpqUvQfr/RLIBS_8e281232ba7/rgdal/proj
PROJ CDN enabled: FALSE
Linking to sp version:1.4-5
To mute warnings of possible GDAL/OSR exportToProj4() degradation,
use options("rgdal_show_exportToProj4_warnings"="none") before loading rgdal.
Overwritten PROJ_LIB was D:/temp/RtmpqUvQfr/RLIBS_8e281232ba7/rgdal/proj
> library(sp)
> proj4string(bndShp)                                     # Current system
[1] "+proj=longlat +ellps=GRS80 +no_defs"
> projUTM <- CRS("+proj=utm +zone=14  +units=m")          # isotropic coordinate sytem
> bndUTM <- spTransform(bndShp, projUTM)                  # Re-project boundary
Warning in spTransform(xSP, CRSobj, ...) :
  NULL source CRS comment, falling back to PROJ string
Warning in wkt(obj) : CRS object has no comment
> storesUTM <- spTransform(foodStoresShp, projUTM)        # Re-project points
Warning in spTransform(xSP, CRSobj, ...) :
  NULL source CRS comment, falling back to PROJ string
Warning in wkt(obj) : CRS object has no comment
> storesDf <- as.data.frame(storesUTM)                    # Extract data-frame
> storesPts <- as.ppp(storesUTM)                          # Convert to .ppp
Error: 'owin' is not an exported object from 'namespace:spatstat'
Execution halted