diff --git a/ChangeLog b/ChangeLog
index d283674..1669b9d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,11 @@
 CHANGELOG:
+v1.19.0
+  - Non-visible and documentation changes for CRAN compliance.
+  - Internal argument handling changes; should generally be invisible, but
+    may in some complex cases avoid problems when calling network().
+  - Bolstered add.edge and add.edges against improper edge.check arguments.
+  - Made get.inducedSubgraph() and permute.vertexIDs() generic.
+  - Replaced now non-functional Pajek URLs with Internet Archive versions.
 v1.18.2
   - Non-visible changes for CRAN compliance.
 v1.18.1
diff --git a/DESCRIPTION b/DESCRIPTION
index 0553e41..200b8fe 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: network
 Version: 1.19.0
-Date: 2023-12-04
+Date: 2024-12-04
 Title: Classes for Relational Data
 Authors@R: c(
     person("Carter T.", "Butts", role=c("aut","cre"), email="buttsc@uci.edu"),
diff --git a/R/access.R b/R/access.R
index 9614225..943ffdf 100644
--- a/R/access.R
+++ b/R/access.R
@@ -6,7 +6,7 @@
 # David Hunter <dhunter@stat.psu.edu> and Mark S. Handcock
 # <handcock@u.washington.edu>.
 #
-# Last Modified 06/06/21
+# Last Modified 12/04/24
 # Licensed under the GNU General Public License version 2 (June, 1991)
 # or greater
 #
@@ -152,6 +152,8 @@ add.edge.network<-function(x, tail, head, names.eval=NULL, vals.eval=NULL, edge.
   if(.validLHS(xn,parent.frame())){  #If x not anonymous, set in calling env 
     on.exit(eval.parent(call('<-',xn,x)))
   }
+  if(is.null(edge.check)||(length(edge.check)<1)||is.na(edge.check[1]))
+    edge.check<-FALSE
   x<-.Call(addEdge_R,x,tail,head,names.eval,vals.eval,edge.check)
   invisible(x)
 }
@@ -185,7 +187,7 @@ add.edges.network<-function(x, tail, head, names.eval=NULL, vals.eval=NULL, ...)
   if(length(unique(c(length(tail),length(head),length(names.eval), length(vals.eval))))>1)
     stop("head, tail, names.eval and vals.eval lists passed to add.edges must be of the same length!\n")
   edge.check<-list(...)$edge.check
-  if(is.null(edge.check))
+  if(is.null(edge.check)||(length(edge.check)<1)||is.na(edge.check[1]))
     edge.check<-FALSE
   #Pass the inputs to the C side
   xn<-substitute(x)
diff --git a/R/fileio.R b/R/fileio.R
index 0ccfc56..d0ddce9 100644
--- a/R/fileio.R
+++ b/R/fileio.R
@@ -126,13 +126,13 @@
 #' @seealso \code{\link{network}}
 #' @references Batagelj, Vladimir and Mrvar, Andrej (2011) Pajek Reference
 #' Manual version 2.05
-#' \url{http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/pajekman.pdf} Section
+#' \url{http://web.archive.org/web/20240906013709/http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/pajekman.pdf} Section
 #' 5.3 pp 73-79
 #' 
 #' Batageli, Vladimir (2008) "Network Analysis Description of Networks"
-#' \url{http://vlado.fmf.uni-lj.si/pub/networks/doc/ECPR/08/ECPR01.pdf}
+#' \url{http://web.archive.org/web/20240511173536/http://vlado.fmf.uni-lj.si/pub/networks/doc/ECPR/08/ECPR01.pdf}
 #' 
-#' Pajek Datasets \url{http://vlado.fmf.uni-lj.si/pub/networks/data/esna/}
+#' Pajek Datasets \url{http://web.archive.org/web/20240411203537/http://vlado.fmf.uni-lj.si/pub/networks/data/esna}
 #' @keywords datasets
 #' @examples
 #' 
diff --git a/man/read.paj.Rd b/man/read.paj.Rd
index ce7668f..7666491 100644
--- a/man/read.paj.Rd
+++ b/man/read.paj.Rd
@@ -125,13 +125,13 @@ read.paj('http://vlado.fmf.uni-lj.si/vlado/podstat/AO/net/Tina.paj')
 \references{
 Batagelj, Vladimir and Mrvar, Andrej (2011) Pajek Reference
 Manual version 2.05
-\url{http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/pajekman.pdf} Section
+\url{http://web.archive.org/web/20240906013709/http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/pajekman.pdf} Section
 5.3 pp 73-79
 
 Batageli, Vladimir (2008) "Network Analysis Description of Networks"
-\url{http://vlado.fmf.uni-lj.si/pub/networks/doc/ECPR/08/ECPR01.pdf}
+\url{http://web.archive.org/web/20240511173536/http://vlado.fmf.uni-lj.si/pub/networks/doc/ECPR/08/ECPR01.pdf}
 
-Pajek Datasets \url{http://vlado.fmf.uni-lj.si/pub/networks/data/esna/}
+Pajek Datasets \url{http://web.archive.org/web/20240411203537/http://vlado.fmf.uni-lj.si/pub/networks/data/esna}
 }
 \seealso{
 \code{\link{network}}