[xep-support] Non-repeatable errors?

repeatdely running xep on an fo file, the reported error changes each time?

c:\files\test\51937>xep op.fo
(document [system-id file:/c:/files/test/51937/op.fo]
  (validate
    [error] Attribute 'clear' cannot have a value of "".
    [validation total: 1 error]
Parse error: Invalid XSL FO source 'file:/c:/files/test/51937/op.fo':
1 error found during validation

c:\files\test\51937>xep -fo op.fo op.pdf
(document [system-id file:/c:/files/test/51937/op.fo]
  (validate
    [error] Attribute 'start-indent' cannot have a value of "".
    [validation total: 1 error]
Parse error: Invalid XSL FO source 'file:/c:/files/test/51937/op.fo':
1 error found during validation

c:\files\test\51937>xep -fo op.fo op.pdf
(document [system-id file:/c:/files/test/51937/op.fo]
  (validate
    [error] Attribute 'keep-together.within-page' cannot have a value of "".
    [validation total: 1 error]
Parse error: Invalid XSL FO source 'file:/c:/files/test/51937/op.fo':
1 error found during validation

c:\files\test\51937>xep -fo op.fo op.pdf
(document [system-id file:/c:/files/test/51937/op.fo]
  (validate
    [error] Attribute 'space-after' cannot have a value of "".
    [validation total: 1 error]
Parse error: Invalid XSL FO source 'file:/c:/files/test/51937/op.fo':
1 error found during validation

Each time it runs, a different error is reported?

How can I chase down the error please?

Searching the file for "" shows no such occurrence?

TiA

-- 
Dave Pawson
XSLT XSL-FO FAQ.
Docbook FAQ.
http://www.dpawson.co.uk
!DSPAM:87,512deb889853136091587!
_______________________________________________
(*) To unsubscribe, please visit http://lists.renderx.com/mailman/options/xep-support
(*) By using the Service, you expressly agree to these Terms of Service http://w
ww.renderx.com/terms-of-service.html