Platform: 2.0.6:
I am designing drug order form in xform 4.3.11, I want to make length of Anti-TB prescription to be calculated from TB prescription end date and TB prescription start date, I followed https://wiki.openmrs.org/display/docs/XForms+Module+Properties+Tab, but calculated field gives undefined result. If needed I will try to reproduce
While in the form designer, can you select “Save As” from the “File” menu? Then paste the contents of the saved file at pastebin.com
Could you point me to the field to look at?
TB_PRESC_LNGTH_CALCULATED, TB_PRESC_START_DATE and TB_PRESC_END_DATE.
Do you have a screenshot?
Try change the calculation to: (new Date(/form/obs/tb_presc_end_date/value) - new Date(/form/obs/tb_presc_start_date/value))/ (1000 * 3600 * 24)
I want to do the same for ART and other drugs in the same form but it looks like you can only calculate one field and not more than that, when I tried to calculate more fields it says too much recursion. Is there a way to do the same for more than one field in one form?.
Can i see what you have done to result into that error?
I wanted to add calculation fields to other drugs, such as art, ipt, cotrimoxazole and others e.g (new Date(/form/obs/art_presc_end_date/value) - new Date(/form/obs/art_presc_start_date/value))/ (1000 * 3600 * 24) for art, (new Date(/form/obs/cot_presc_end_date/value) - new Date(/form/obs/cot_presc_start_date/value))/ (1000 * 3600 * 24) for cotrimoxazole, (new Date(/form/obs/ipt_presc_end_date/value) - new Date(/form/obs/ipt_presc_start_date/value))/ (1000 * 3600 * 24) for ipt, as shown in the screenshot
but when I preview the form it brings this error
Looks like this form has some problems because I developed new form and works fine,
Good that you figured it out. 
