Spellcasting DC \ Difficulty autocalc

So I have this formula for counting characters Spells DC - I suspect I cannot reference spell_ability value to use modifier from it by using formula like  @{@{spell_ability}_mod} ? <div class="sheet__spell">       <h2>          Spells       </h2>   Spellcasting Ability  <select id="spell_ability">   <option value="null">None</option>       <option value="int">Intelligence</option>   <option value="wis">Wisdom</option>   <option value="cha">Charisma</option>   </select> </br>      Spells Difficulty <input class="input" type="number" disabled="true" name="attr_spells_dif" value="8+@{@{spell_ability}_mod}+@{prof}" />

You cant built up attributes like that, due to oll20's order of operations. You must always supply the full attribute name. What you can do is put the attribute call in the select options: <div class="sheet__spell">     <h2>         Spells     </h2>     Spellcasting Ability     <select id="spell_ability">         <option value="0">None</option>         <option value="@{int_mod}">Intelligence</option>         <option value="@{wis_mod}">Wisdom</option>         <option value="@{cha_mod}">Charisma</option>     </select> </br>     Spells Difficulty <input class="input" type="number" disabled="true" name="attr_spells_dif" value="8 +@{spell_ability} +@{prof}" />

Stupid me! However, it not transferred what we wanted... :(

The problem is most likely this line <select id="spell_ability"> It should be <select name="attr_spell_ability">

Thanks - changed to your proposed lines - and it worked. ;) Each time you change Spell Ability, it makes other number - even with chosen option 'None'. But I can live with it, if this is unavoidable.

Depending on how you using values, this might work <select id="spell_ability">         <option value="0">None</option>         <option value="8 + @{int_mod}+@{prof}">Intelligence</option>         <option value="8 + @{wis_mod}+@{prof}">Wisdom</option>         <option value="8 + @{cha_mod}+@{prof}">Charisma</option>     </select> </br>     Spells Difficulty <input class="input" type="number" disabled="true" name="attr_spells_dif" value=" @{spell_ability} " />

Not working this solution... :/

I forgot to correct the name, which I'd mentioned in the previous post.     <select name="attr_spell_ability">         <option value="0">None</option>         <option value="8 + @{int_mod}+@{prof}">Intelligence</option>         <option value="8 + @{wis_mod}+@{prof}">Wisdom</option>         <option value="8 + @{cha_mod}+@{prof}">Charisma</option>     </select> </br>     Spells Difficulty <input class="input" type="number" disabled="true" name="attr_spells_dif" value=" @{spell_ability} " />

Thanks, this setting solves all the problems I have. Once more, thank you for support here! :)

Great! and thank you :)