I am getting this error for a while now, and I can't seem to fix it?! Here is my code - my table won't even load because of this error.
\documentclass{article}
\usepackage{hyperref}
\usepackage{graphicx}
\begin{document}
\begin{table}[ht]
\centering % used for centering table
\caption{Parameter Estimates} % title of Table
\resizebox{\textwidth}{!}{
\begin{tabular}{|l|l|l|l|} % centered columns (4 columns)
\hline\hline %inserts double horizontal lines
Description & Parameter & Estimate(per day) & Source \\ [0.5ex] % inserts table %heading
\hline % inserts single horizontal line
\hline
Population of Andhra Pradesh, Tamil Nadu, Maharashtra, and Karnataka & N & 330,308,167 & CIA World Factbook \\ \hline
Ratio of above population in India population & Scale & 0.2671651242 & Calculated \\ \hline
\multicolumn{4}{|c|}{\textbf{INITIAL CONDITIONS (POPULATIONS)}} \\ \hline
HIV-susceptible, TB-susceptible & $X_{SS}(0)$ & 192,941,151 & Calculated \\ \hline
HIV-susceptible, TB-infected & $X_{ST}(0)$ & 132,478,723 & Calculated \\ \hline
HIV+, TB-susceptible & $X_{HS}(0)$ & 2,422,951 & Calculated \\ \hline
Co-infected & $X_{HT}(0)$ & 1,817,998 & Calculated \\ \hline
HIV-susceptible, TB-treatment (1st stage) & $X_{S+T_T^{(1)}}(0)$ & 161,501 & Calculated \\ \hline
HIV-susceptible, TB-treatment (2nd stage) & $X_{S+T_T^{(2)}}(0)$ & 161,501 & Calculated \\ \hline
HIV-susceptible, TB-cured & $X_{S+T_T^{(3)}}(0)$ & 145,865 & Calculated \\ \hline
HIV+, TB-cured & $X_{H+T_T^{(3)}}(0)$ & 117 & AIDSInfo Online Database \\ \hline
HIV+, TB-treatment (1st stage) & $X_{H+T_T^{(1)}}(0)$ & 7,953 & AIDSInfo Online Database \\ \hline
HIV+, TB-treatment (2nd stage) & $X_{H+T_T^{(2)}}(0)$ & 7,953 & Calculated \\ \hline
HIV-treatment, TB-treatment (1st stage) & $X_{H_T+T_T^{(1)}}(0)$ & 3,445 & UNAIDS Global report (2013) \\ \hline
HIV-treatment, TB-treatment (2nd stage) & $X_{H_T+T_T^{(2)}}(0)$ & 3,445 & Assumption \\ \hline
HIV-treatment, TB-cured & $X_{H_{T_1}}(0)$ & 3,032 & Worldbank data \\ \hline
HIV-treatment, no history of TB & $X_{H_{T_2}}(0)$ & 152,450 & WHO 2013 Global TB Report \\ \hline
HIV-treatment, paradoxical IRIS & $X_{IRIS}(0)$ & 82 & A5221 Stride Study \\ \hline
\multicolumn{4}{|l|}{\textbf{ADDITIONAL PARAMETERS}} \\ \hline
Recruitment/maturation rate & $\Lambda$ & 531,062 & CIA World Factbook \\ \hline
Natural death rate & $\mu$ & 3.9138943e-5 & \url{http://planningcommission.nic.in/data/datatable/0306/table%20226.pdf} \\ \hline
AIDS death rate & $\mu_H$ & 1.3698630e-3 & Long et al. (2008) \\ \hline
TB death rate & $\mu_T$ & 5.4794521e-4 & Long et al. (2008) \\ \hline
Paradoxical IRIS death rate & $\mu_{IRIS}$ & 4.8947959e-5 & Laureillard et al. (2011) \\ \hline
HIV sufficient contact rate & $\beta$ & 4.6575342e-4 & Long et al. (2008) \\ \hline
TB sufficient contact rate & $\tau$ & 1.0958904e-2 & Long et al. (2008) \\ \hline
HIV regular treatment rate & $\lambda_H$ & 1 & Varied \\ \hline
HIV early treatment rate & $\lambda_{H_1}$ & 0 & Varied \\ \hline
HIV late treatment rate & $\lambda_{H_2}$ & 1 & Varied \\ \hline
TB regular treatment rate & $\lambda_T$ & 1 & Varied \\ \hline
TB treatment stage transition rate (Stage 1 to Stage 2) & $\lambda_{T_1}$ & 1.6666667e-2 & Calculated \\ \hline
TB treatment stage transition rate (Stage 2 to Stage 3) & $\lambda_{T_2}$ & 8.3333333e-3 & Calculated \\ \hline
Rate of occurrence of paradoxical IRIS & $\gamma$ & 2.7528463e-4 & Bonnet et al. (2013) \\ \hline
Modification parameter & $\psi$ & 0.15 & Varied \\ \hline
Modification parameter & $\alpha$ & 0.075 & Estimated \\ \hline
\end{tabular}
}
\end{table}
\end{document}


planningcommissionURL has a%which is the source of the problem. Escape it using\%. – Werner Jul 21 '14 at 20:06\resizebox{\textwidth}{!}{...}– Jul 21 '14 at 20:10\resizebox{%and\end{tabular}%– Heiko Oberdiek Jul 21 '14 at 20:10\resizebox{\textwidth}{!}{(although if you must add a%there). It just introduces inconsistent font sizes. – David Carlisle Jul 21 '14 at 20:31tabular) is read by\resizeboxwithout consideration of the\urlcommand (it's just another macro). And, in doing so, there is a missing end-brace, causing the problem. – Werner Jul 21 '14 at 20:41\urldeffrom theurlpackage. See Getting percent sign into an URL in a footnote. – Werner Jul 21 '14 at 21:12