Hi all.

I apologise if this has already been asked, but I have spent the last hour searching and most of the posts seem to cover the old syntax and/or just doesn't seem to work.

I'm pretty new to Umbraco (usually work in Joomla / PHP), so this is all quite new and strange to me. :)

I've created an xslt file and macro to pull data from a content picker field into a 'read on' style button.

Here is my code;

  <a class="small-btn blue rounded-1" href="{umbraco.library:NiceUrl($currentPage/readOnLink)}">Read on</a>

Works perfectly.

However, I need three of these, so I figured I'd simply rename the node readOnLinkOne and then repeat the process for each button (there is probably a much more elegant way, but this seemed simple).

So I changed the code to;

  <a class="small-btn blue rounded-1" href="{umbraco.library:NiceUrl($currentPage/readOnLinkOne)}">Read on</a>

And now it doesn't work. I have changed the field aliases etc in the doctypes and in the templates to match the new code. 

This is the error;

System.OverflowException: Value was either too large or too small for an Int32.
   at System.Convert.ToInt32(Double value)
   at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
   at System.Xml.Xsl.Runtime.XmlQueryRuntime.ChangeTypeXsltArgument(XmlQueryType xmlType, Object value, Type destinationType)
   at System.Xml.Xsl.Runtime.XmlQueryContext.InvokeXsltLateBoundFunction(String name, String namespaceUri, IList`1[] args)
   at (XmlQueryRuntime 
{urn:schemas-microsoft-com:xslt-debug}runtime)
   at Root(XmlQueryRuntime 
{urn:schemas-microsoft-com:xslt-debug}runtime)
   at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, 
XmlResolver dataSources, XsltArgumentList argumentList, XmlWriter 
writer)
   at System.Xml.Xsl.XslCompiledTransform.Transform(IXPathNavigable 
input, XsltArgumentList arguments, TextWriter results)
   at umbraco.macro.GetXsltTransformResult(XmlDocument macroXML, 
XslCompiledTransform xslt, Dictionary`2 parameters)
   at 
umbraco.presentation.umbraco.developer.Xslt.xsltVisualize.visualizeDo_Click(Object
 sender, EventArgs e)

I found a suggestion on here somewhere to add an if statement around it, like thus;

 <xsl:if test="$currentPage/readOnLinkOne != null">
  <a class="small-btn blue rounded-1" href="{umbraco.library:NiceUrl($currentPage/readOnLinkOne)}">Read on</a>
    </xsl:if>

But, while it fixes the error, now the XLST doesn't generate any output.

Have I overlooked something? I tried looking through the documentation and at the tutorial videos, but again they seem to use the old syntax that no longer works.

I appreciate any help / suggestions / shoves in the right direction!

Thank you.