heatmap.2: Colv dendrogram doesn't match size of x

Hi List, 
I've got some problems doing a heatmap with following peace of code: 

library(gplots) 
row_distance = dist(dfdat_zscore, method =manhattan") 
row_cluster = hclust(row_distance, method = "ward.D") 
col_distance = dist(dfdat_zscore, method = "manhattan") 
col_cluster = hclust(col_distance, method = "ward.D") 

heatmap.2(as.matrix(dfdat_zscore), 
main = "Z-score", 
notecol="black", 
density.info="none", 
trace="none", 
margins =c(12,9), 
col=redgreen(75), 
breaks=col_breaks, 
dendrogram = "both", 
cexCol=0.5, cexRow=0.5, 
key=T, keysize=1.0, 
Rowv = as.dendrogram(row_cluster), 
Colv = as.dendrogram(col_cluster), 
distfun = dist(method = "manhattan"), 
hclustfun = hclust(col_distance, method = "ward.D"), 
labRow=rownames(df_zscore)) 

I've read some posts suggesting to upgrade gplots. However, the issue seems to persist with gplots_2.14.1 
Any help is appreciated. 
Best. 

Additional information: 
> sessionInfo() 
R version 3.1.1 (2014-07-10) 
Platform: x86_64-pc-linux-gnu (64-bit) 

locale: 
[1] C 

attached base packages: 
[1] stats graphics grDevices utils datasets methods base 

other attached packages: 
[1] gplots_2.14.1 

loaded via a namespace (and not attached): 
[1] KernSmooth_2.23-12 bitops_1.0-6 caTools_1.17 gdata_2.13.3 
[5] gtools_3.4.1 

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