There are not enough information to provide you with a useful solution but you can use debugging information for further inspection.
Put everything before \starttext of the following example to your document to find clues for the missing references.
%%%% begin example \setupinteraction[state=start]
\enabletrackers[nodes.references.show,nodes.references] \enabletrackers[nodes.destinations.show,nodes.destinations]
\enabletrackers[structures.referencing,structures.referencing.*]
\starttext
See \pagereference[one]reference two at \at{page}[two].
\page
See \pagereference[two]reference one at \at{page}[one].
\stoptext %%%% end example
Wolfgang
Thanks for the hint and the code. While your example runs nicely, if I run 15 pages from my book it produces log file entries not unlike in your example, but then crashes with the errors given below. Since apart from this the book works just fine, and I can always add the references by hand in the end, there is no need to pursue this too long. I am sure I have messed up a few definitions by copying from examples I did not fully understand. Best Jürgen ... structures > bookmark: The Text and its Critics structure > sectioning > section @ level 3 : 0.1.3 -> The Text and its Critics references > identifying > type '1a', reference 'internal(0)', index 1, prefix '', special 'internal', kind 'special operation' references > internal(0)={ { ["kind"]="special operation", ["operation"]="0", ["reference"]="internal(0)", ["special"]="internal", }, ["n"]=15, ["prefix"]="", ["reference"]="internal(0)", } backend > references > resolving attribute 12 backend > references > unable to resolve annotation 12 backend > references > resolving attribute 13 backend > references > unable to resolve annotation 13 backend > destinations > resolving attribute 22 backend > destinations > resolving attribute 21 backend > destinations > resolving attribute 23 pages > flushing realpage 16, userpage 16, subpage 16 tex memory > bumping category 'input' succeeded, details: all=640000 | ini=-1 | max=100000 | mem=20000 | min=10000 | ptr=10001 | set=100000 | stp=10000 | top=10001 tex memory > bumping category 'input' succeeded, details: all=960000 | ini=-1 | max=100000 | mem=30000 | min=10000 | ptr=20001 | set=100000 | stp=10000 | top=20001 tex memory > bumping category 'input' succeeded, details: all=1280000 | ini=-1 | max=100000 | mem=40000 | min=10000 | ptr=30001 | set=100000 | stp=10000 | top=30001 tex memory > bumping category 'input' succeeded, details: all=1600000 | ini=-1 | max=100000 | mem=50000 | min=10000 | ptr=40001 | set=100000 | stp=10000 | top=40001 tex memory > bumping category 'input' succeeded, details: all=1920000 | ini=-1 | max=100000 | mem=60000 | min=10000 | ptr=50001 | set=100000 | stp=10000 | top=50001 tex memory > bumping category 'input' succeeded, details: all=2240000 | ini=-1 | max=100000 | mem=70000 | min=10000 | ptr=60001 | set=100000 | stp=10000 | top=60001 tex memory > bumping category 'input' succeeded, details: all=2560000 | ini=-1 | max=100000 | mem=80000 | min=10000 | ptr=70001 | set=100000 | stp=10000 | top=70001 tex memory > bumping category 'input' succeeded, details: all=2880000 | ini=-1 | max=100000 | mem=90000 | min=10000 | ptr=80001 | set=100000 | stp=10000 | top=80001 tex memory > bumping category 'token' succeeded, details: all=8000000 | ini=553139 | max=10000000 | mem=1000000 | min=1000000 | ptr=1272890 | set=10000000 | stp=250000 | top=1000000 tex memory > bumping category 'input' succeeded, details: all=3200000 | ini=-1 | max=100000 | mem=100000 | min=10000 | ptr=90001 | set=100000 | stp=10000 | top=90001 tex memory > bumping category 'input' failed, details: all=3200000 | ini=-1 | max=100000 | mem=100000 | min=10000 | ptr=100001 | set=100000 | stp=10000 | top=100001 tex error > tex error on line 452 in file Introduction.tex: TeX capacity exceeded, sorry [input=100000] --- Prof. Dr. Juergen Hanneder Philipps-Universitaet Marburg FG Indologie u. Tibetologie Deutschhausstr.12 35032 Marburg Germany Tel. 0049-6421-28-24930 hanneder@staff.uni-marburg.de