cs2cs EPSG:4326+5773 EPSG:4258+5773 throws an Error

[jjimenezshaw]

Example of problem

This command line
echo 52 13 0 | ./cs2cs EPSG:4326+5773 EPSG:4258+5773 -f "%.3f"
produces this error
* * inf

while I was expecting something like
52.000 13.000 0.000

However trying other combinations I got resutls:
echo 52 13 0 | ./cs2cs EPSG:4326 EPSG:4258 -f "%.3f" ==> 52.000 13.000 0.000
echo 52 13 0 | ./cs2cs EPSG:4326 EPSG:4258+5773 -f "%.3f" ==> 52.000 13.000 -41.808
echo 52 13 0 | ./cs2cs EPSG:4979 EPSG:4258+5773 -f "%.3f" ==> 52.000 13.000 -41.808
echo 52 13 0 | ./cs2cs EPSG:4326+5773 EPSG:4258 -f "%.3f" ==> 52.000 13.000 41.808
echo 52 13 0 | ./cs2cs EPSG:4326+5773 EPSG:4937 -f "%.3f" ==> 52.000 13.000 41.808

Problem description

I do not see why it is not able to compute the transformation on the same VERT_CS, while it is able to compute all the other shown above. Am I doing something wrong?

Expected Output

52.000 13.000 0.000

Environment Information

• PROJ version (proj) : 7.0.0
• Operation System Information : Ubuntu 18.04

PROJ_LIB=/home/jshaw/work/proj/build/data:/home/jshaw/work/proj-datumgrid/europe:/home/jshaw/work/proj-datumgrid/north-america:/home/jshaw/work/proj-datumgrid/world:/home/jshaw/work/proj-datumgrid

Installation method

Compiled from source (tag 7.0.0) with CMake (in /home/jshaw/work/proj/build). curl was disabled. Datumgrids cloned from github (see PROJ_LIB above).

[jjimenezshaw]

Thanks!