Hello, according to [[info:org#References]] (see Named references) is possible to use a property in formulas. This generally works, but not when the property is a time value as defined in [[info:org#Durations%20and%20time%20values]].
Please have a look at the following ECM: * test table with constant (working) :PROPERTIES: :constant: 3 :END: | month | days | results | |-------+-------+---------| | 01 | 1 | 3 | | 02 | 3 | 9 | #+TBLFM: $3=$2*$PROP_constant; * test table with time constant (not working) :PROPERTIES: :time_constant: 08:00:00 :END: | month | days | time | |-------+------+------| | 01 | 1 | | | 02 | 3 | | #+TBLFM: $3=$2*$PROP_time_constant;T Pressing C-u C-c C-c over the table shows in the message buffer: org-table-eval-formula: Wrong type argument: stringp, (13 "Bad format") Also is not possible to debug the code even with the formula debug enabled. Omitting the ";T" part will cause the debug to work and then the string #ERROR show up in the cell. My version is Org-mode version 8.3beta (release_8.3beta-1080-g367d48 @ /home/user/.emacs.d/el-get/org-mode/lisp/) Best, Daniele