Exception occured while publishing message to the topic :: [

Exception occured while publishing message to the topic :: [

I"m getting this error while saving one part of my script without having modified it :
I'ts a "on add" script on a lookup field linked to another form. It uses the data of one form to calculate the results of this form.
the script works but I can't modify it anymore or even saving it without modifying it at all. It's a bug that happend like that, for no reason.

Each time I get this message :
"Exception occured while publishing message to the topic :: [DataModelTopic]"

this is my script :

installation = Question_1 [(enregistrement == input.enregistrement && User_ID == zoho.loginuserid)];
input.R62 = (input.R61 * input.R59);
input.R63 = (input.R60 * input.R61);
input.R69 = (input.R68 * input.R66);
input.R70 = (input.R67 * input.R68);
input.R76 = (input.R75 * input.R73);
input.R77 = (input.R74 * input.R75);
input.R83 = (input.R82 * input.R80);
input.R84 = (input.R81 * input.R82);
input.R86 = (input.R62 + input.R69 + input.R76 + input.R83);
input.R88 = (input.R86 * installation.R87);
input.R90 = (input.R63 + input.R70 + input.R77 + input.R84);
input.R91 = (input.R90 * installation.R50);
input.R92 = (input.R90 * (installation.R51 + installation.R52));
if (input.R90 > 0.1)
{
input.R93 = (installation.R53 * input.R56);
input.R94 = (input.R56 * installation.R55);
}
else if (input.R90 == 0)
{
input.R93 = (input.R56 * installation.R54);
input.R94 = 0;
}
else
{
input.R93 = 0;
input.R94 = 0;
}
input.R95 = (input.R91 + input.R92 + input.R93 + input.R94);
input.R96 = (input.R95 + input.R88);
input.R98 = (input.R96 / installation.R97);
input.R99 = (0.1 * 2 * (input.qtefluide_HP + input.qtefluide_BP));
input.R108 = (input.R106 + input.R104 + input.R101 + input.R100 + input.R99 + input.R96);
input.R110 = (input.R108 * input.R109);
input.R112 = (input.R103 + input.R110);

abea