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

> ### Name: plotClusterAgreementHeat
> ### Title: Plot a heatmap that plots the agreements between replicates
> ###   after clusterrnaCrosslink has been performed
> ### Aliases: plotClusterAgreementHeat
> ###   plotClusterAgreementHeat,rnaCrosslinkDataSet-method
> 
> ### ** Examples
> 
> 
> cds = makeExamplernaCrosslinkDataSet()
 ******************************************** 
 *****            rnaCrosslink-OO          ****** 
 ******************************************** 
 *****-------*******************-------****** 
 *****       Reading SampleTable       ****** 
 *****       Detected  2  Samples      ****** 
 *****     detected group c:: 2       ***** 
 *****     detected group s:: 1       ***** 
 ****      Sample Names:  s1 c1    ****  ****      Sample Names:  s1 c1    ****  ****      Sample Names:  s1 c1    ****  ****      Sample Names:  s1 c1    **** 
 *****         Reading Input Files        ***** 
 *****  Checking Subsetting Options  ***** 
 *****  No user subsetting chosen  ***** 
 *****  Checking Sampling Options  ***** 
 *****  No user sampling chosen  ***** 
 *****     Getting RNAs of Interest    ****** 
 *****    RNA of interest + Host RNA    ***** 
 *****      RNA of interest Alone       ***** 
 *****         Making Matrices         ****** 
 *****          RNA Size:  83         ***** 
 *****         Creating object          ***** 
 *****-------*******************-------****** 
 ******************************************** 
 ******************************************** 
> 
> 
> clusteredCds = clusterrnaCrosslink(cds,
+                 cores = 1,
+                 stepCount = 1,
+                 clusterCutoff = 0)
********************************************
****  transcript1  *****
****               83  nt             ****
****       Assessing Long Range         ****
****        Sampling Long Range         ****
Error in serverSocket(port = port) : 
  creation of server socket failed: port 11668 cannot be opened
Calls: clusterrnaCrosslink ... clusterrnaCrosslink -> makeCluster -> makePSOCKcluster -> serverSocket
Execution halted