Grails Runtime Exception

org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error applying layout : publicLayout

	at grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter.doFilter(GrailsAnonymousAuthenticationFilter.java:53)

	at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.java:62)

	at grails.plugin.springsecurity.web.SecurityRequestHolderFilter.doFilter(SecurityRequestHolderFilter.java:59)

	at java.lang.Thread.run(Thread.java:748)

Caused by: org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: Error executing tag <g:render>: Error executing tag <g:pdfLink>: String index out of range: -1

	... 4 more

Caused by: org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Error executing tag <g:render>: Error executing tag <g:pdfLink>: String index out of range: -1

	at gsp_seuE11_layoutspublicLayout_gsp.run(gsp_seuE11_layoutspublicLayout_gsp.groovy:22)

	... 4 more

Caused by: org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Error executing tag <g:pdfLink>: String index out of range: -1

	at gsp_seuE11_layouts_personalitzacions_esparreguera_gsp$_run_closure2.doCall(gsp_seuE11_layouts_personalitzacions_esparreguera_gsp.groovy:343)

	at gsp_seuE11_layouts_personalitzacions_esparreguera_gsp.run(gsp_seuE11_layouts_personalitzacions_esparreguera_gsp.groovy:934)

	... 5 more

Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1

	at java.lang.String.substring(String.java:1960)

	at seue10.CopiaAutenticaTagLib$_closure2.doCall(CopiaAutenticaTagLib.groovy:33)

	... 7 more