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

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: oc
> ### Title: Optimal Classification Roll Call Scaling
> ### Aliases: oc
> ### Keywords: multivariate
> 
> ### ** Examples
> 
>     #This data file is the same as reading file using:
>     ## Not run: 
> ##D     sen90 <- readKH("ftp://voteview.com/sen90kh.ord")
> ##D     
> ## End(Not run)
>     #All ORD files can be found on www.voteview.com
>     data(sen90)
>     summary(sen90)
Source:		 C:/sen90kh.ord 

Number of Legislators:		 102
Number of Roll Call Votes:	 596


Using the following codes to represent roll call votes:
Yea:		 1 2 3 
Nay:		 4 5 6 
Abstentions:	 7 8 9 
Not In Legislature:	 0 

Party Composition:
 D  R 
65 37 

Vote Summary:
               Count Percent
0 (notInLegis)   690     1.1
1 (yea)        26989    44.4
2 (yea)         1065     1.8
3 (yea)         2924     4.8
4 (nay)         1504     2.5
5 (nay)         1047     1.7
6 (nay)        20206    33.2
8 (missing)        1     0.0
9 (missing)     6366    10.5

Use summary(sen90,verbose=TRUE) for more detailed information.
> 
> 	#Small executable example
> 	sen90.1d <- oc(sen90,dims=1,polarity=c(7))

Preparing to run Optimal Classification...

	Checking data...

		All members meet minimum vote requirements.

		Votes dropped:
		... 77 of 596 total votes dropped.

	Running Optimal Classification...

		Generating Start Coordinates...
		Running Edith Algorithm...
		Permuting adjacent legislator pairs...
		Permuting adjacent legislator triples...


Optimal Classification completed successfully.
Optimal Classification took 5.407 seconds to execute.

> 
>     #Output file identical to one produced by command below
>     ## Not run: 
> ##D     sen90oc <- oc(sen90,dims=2,polarity=c(7,2))
> ##D 	
> ## End(Not run)
>     data(sen90oc)
>     summary(sen90oc)


SUMMARY OF OPTIMAL CLASSIFICATION OBJECT
----------------------------

Number of Legislators:	 102 (0 legislators deleted)
Number of Votes:	 519 (77 votes deleted)
Number of Dimensions:	 2
Predicted Yeas:		 20935 of 23899 (87.6%) predictions correct
Predicted Nays:		 19675 of 22541 (87.3%) predictions correct

The first 10 legislator estimates are:
                 coord1D coord2D
JOHNSON (D USA)   -0.468  -0.392
SPARKMAN (D AL)    0.203   0.603
HILL (D AL)        0.320   0.678
GRUENING (D AK)   -0.510   0.833
BARTLETT (D AK)   -0.365   0.605
HAYDEN (D AZ)     -0.010   0.621
FANNIN (R AZ)      0.740  -0.188
FULBRIGHT (D AR)   0.008   0.881
MCCLELLAN (D AR)   0.596   0.476
KUCHEL (R CA)     -0.057  -0.597
>     plot(sen90oc) 
Error in axis(2, at = yt, ...) : 
  formal argument "at" matched by multiple actual arguments
Calls: plot -> plot.OCobject
Execution halted